---
name: worldbuild-expand
description: Develop rich, consistent world-building elements with depth and logic
---

# Worldbuild Expand - World-Building Development

## What This Skill Does

Helps you create immersive, logical world-building by:

1. **Developing Systems** - Magic, technology, social structures, economics
2. **Ensuring Consistency** - Logical rules and consequences
3. **Adding Depth Layers** - Surface → Practical → Hidden implications
4. **Integrating with Story** - Making world-building matter to plot

**Output**: Detailed world element with rules, exceptions, plot hooks, and consistency checks.

---

## When to Use This Skill

Use `/worldbuild-expand` when you need to develop:
- Magic systems
- Technology/science rules
- Social hierarchies and cultures
- Economic systems
- Political structures
- Geography and ecology
- Historical events
- Languages and religions

**Don't use for**:
- Character creation (use `/character-forge`)
- Plot development (use `/plot-next`, `/conflict-next`)

---

## The World-Building Pyramid

### 3 Layers Every Element Needs

```
LAYER 1: SURFACE (What characters see)
   ↓
LAYER 2: MECHANICS (How it actually works)
   ↓
LAYER 3: IMPLICATIONS (What it means for society/plot)
```

**Example - Magic System**:
```
SURFACE: Wizards cast spells with wands and words
MECHANICS: Magic drains life force; bigger spell = more drain
IMPLICATIONS: Powerful magic is rare (most wizards die young)
              → Only rich can afford to lose life (healing magic exists)
              → Creates class system based on magical "wealth"
```

---

## Sanderson's Laws of World-Building

### Law 1: Solve Problems with Systems You've Established

**Rule**: Magic can solve problems if reader understands the cost/limits

**Good**:
```
Established: Healing magic requires sacrifice of memories
Problem: Character needs healing
Solution: Sacrifices memory of loved one (emotional cost)
```

**Bad**:
```
Established: Nothing about healing
Problem: Character dying
Solution: Random healer appears with convenient cure
```

---

### Law 2: Limitations > Powers

**Rule**: Weaknesses are more interesting than strengths

**Example - Magic System**:
```
✅ GOOD: Fire magic burns the caster's hands (can only use 3x/day)
❌ BORING: Fire magic with no cost or limit
```

**Why**: Limitations create conflict, force creativity

---

### Law 3: Expand Before You Complicate

**Rule**: Explore established rules deeply before adding new ones

**Example - Time Travel**:
```
✅ GOOD: Master 1 time travel rule (can only go back 24 hours)
         Explore ALL implications of this limitation

❌ BAD: Add new rule every chapter (parallel timelines, paradoxes,
        time loops, quantum states) → Confusing mess
```

---

## The Consistency Matrix

### Every World Element Needs 5 Components

#### 1. CORE RULE
**The fundamental law that governs this element**

Example (Magic):
```
"Magic is powered by human emotions. Stronger emotion = stronger spell."
```

#### 2. LIMITATIONS
**What CAN'T be done (more important than what CAN)**

Example (Magic):
```
- Emotions fade (spell duration limited)
- Artificial emotions don't work (must be genuine)
- Dead people feel nothing (no necromancy)
- Sustained emotion is exhausting (can't spam spells)
```

#### 3. COST/CONSEQUENCE
**Price paid for using this element**

Example (Magic):
```
- Emotional burnout (feel numb afterward)
- Addiction (crave emotional highs)
- Vulnerability (enemies can manipulate emotions)
- Psychological toll (trauma fuels dark magic)
```

#### 4. EXCEPTIONS
**The rare cases that break the rule (1-2 max)**

Example (Magic):
```
Exception: Ancient artifacts can store emotions (rare, valuable)
Exception: Sociopaths can fake emotions well enough to cast (dangerous)
```

#### 5. SOCIETAL IMPACT
**How does this shape culture, economy, politics?**

Example (Magic):
```
- Actors/performers are powerful (can summon emotions easily)
- Therapy is illegal (prevents emotional accumulation)
- Emotional crimes (causing fear/anger in others to fuel spells)
- Marriage = magical partnership (combined emotional power)
```

---

## Development Process by Element Type

### MAGIC SYSTEM

#### Questions to Answer:

**Source**:
- Where does magic come from? (innate, learned, gifted by gods?)
- Is it finite or infinite?
- Can it be depleted?

**Mechanics**:
- How is it accessed? (words, gestures, will, tools?)
- What can it do? (elements, healing, illusion, transformation?)
- What can't it do? (bring back dead, time travel, mind control?)

**Cost**:
- Physical (exhaustion, aging, injury?)
- Mental (sanity, memories, focus?)
- Spiritual (soul damage, karma, debt?)
- Social (feared, worshipped, regulated?)

**Distribution**:
- Who can use magic? (everyone, bloodlines, random, trained?)
- How common is it? (1 in 100? 1 in 10,000?)
- Can non-mages detect it?

**Limitations**:
- Hard limits (physically impossible)
- Soft limits (difficult but not impossible)
- Cultural limits (taboos, laws, ethics)

---

### TECHNOLOGY SYSTEM

#### Questions to Answer:

**Advancement Level**:
- Medieval, Renaissance, Industrial, Modern, Futuristic?
- Consistent across regions or varied?
- Is progress accelerating or stagnant?

**Key Technologies**:
- Transportation (how fast can people travel?)
- Communication (instant or delayed?)
- Medicine (life expectancy, disease control?)
- Weaponry (range, power, accessibility?)

**Energy Source**:
- Coal, steam, electricity, nuclear, magic-tech hybrid?
- Finite or renewable?
- Who controls access?

**Societal Impact**:
- Does tech create equality or divide?
- Who benefits? Who suffers?
- Resistance movements?

---

### SOCIAL/POLITICAL SYSTEM

#### Questions to Answer:

**Power Structure**:
- Monarchy, democracy, theocracy, anarchy?
- Centralized or decentralized?
- How is power transferred?

**Social Classes**:
- Number of classes (2? 5? Fluid or rigid?)
- Mobility (can people rise/fall?)
- Basis (wealth, birth, magic, merit?)

**Laws and Justice**:
- Who makes laws? Enforces them?
- Trial system? Punishment types?
- Corruption level?

**Cultural Values**:
- Individualism vs collectivism?
- Honor, pragmatism, knowledge, power?
- Taboos and sacred practices?

---

### ECONOMIC SYSTEM

#### Questions to Answer:

**Currency**:
- Coins, barter, magic crystals, digital?
- Stable or inflating?
- Who mints/controls it?

**Resources**:
- What's valuable? (gold, food, water, magic, knowledge?)
- What's scarce?
- Trade systems (local, international, black market?)

**Labor**:
- Slavery, serfdom, wage labor, free?
- Guilds, unions, corporations?
- Unemployment and poverty levels?

**Wealth Distribution**:
- Who's rich? Who's poor?
- Middle class exists?
- Economic mobility possible?

---

## The Iceberg Principle

### 90% Hidden, 10% Shown

**Don't explain everything**. Hint at depth:

**Bad (Over-explained)**:
```
"As you know, the War of Three Kings lasted 50 years and was caused by a dispute over the Sacred Orb, which has the power to control weather. King Aldric of the North allied with..."
```

**Good (Iceberg method)**:
```
The tavern's sign read "Est. Year 1203 - The After-War Tavern."

"You fought in the Three Kings?" she asked.

He touched the faded scar on his neck. "Nobody won that war."
```

**Result**: Reader knows:
- There was a war
- It's called "Three Kings"
- It's history now (tavern is "after-war")
- Scars remain (physical and emotional)
- Complexity (nobody won)

**Deeper world implied, not dumped**.

---

## Common World-Building Mistakes

### Mistake 1: Info-Dumping

**Problem**: Stopping story to explain world

**Bad**:
```
Chapter 2 is 5,000 words of magic system explanation before anyone casts a spell.
```

**Fix**: SPRINKLE, don't DUMP
```
Reveal world through:
- Action (character uses magic, reader sees it)
- Conflict (magic fails, reader learns limitation)
- Dialogue (argument about magic ethics)
- Environment (signs warning "No Unsanctioned Spellcasting")
```

---

### Mistake 2: Inconsistent Rules

**Problem**: World rules change to fit plot convenience

**Example**:
```
Chapter 3: "Magic can't bring back the dead."
Chapter 15: Convenient resurrection because plot needs it
```

**Fix**: ESTABLISH → FOLLOW → EXCEPTION ONLY IF COSTLY
```
Chapter 3: "Magic can't bring back the dead."
Chapter 15: Ancient, forbidden ritual can (costs caster's life + moral corruption)
```

---

### Mistake 3: No Societal Impact

**Problem**: Cool world element but doesn't affect society

**Example**:
```
Teleportation exists but people still use horses.
Mind-reading exists but criminals aren't interrogated with it.
Healing magic exists but people still die from disease.
```

**Fix**: THINK THROUGH IMPLICATIONS
```
If teleportation exists:
- No need for roads/ships (economy shifts)
- Borders are meaningless (political impact)
- Crime is hard to contain (can escape instantly)
- Military tactics change (surprise attacks anywhere)
→ Why do people still use horses? MUST HAVE REASON (costly, rare, dangerous, etc.)
```

---

### Mistake 4: Monolithic Cultures

**Problem**: Entire race/nation acts the same

**Example**:
```
"All elves are wise and peaceful."
"All dwarves love mining and beer."
```

**Fix**: INTERNAL DIVERSITY
```
Elves have factions:
- Traditionalists (isolationist)
- Reformers (integrate with humans)
- Radicals (want to rule humans)

Dwarves have culture variation:
- Mountain clans (miners, traditional)
- Urban dwarves (merchants, cosmopolitan)
- Exile communities (lost traditions, adapted to surface)
```

---

### Mistake 5: Modern Values in Historical Setting

**Problem**: Medieval world with 21st-century ethics

**Example**:
```
Medieval fantasy where everyone believes in gender equality, democracy, religious tolerance, and therapy.
```

**Fix**: HISTORICALLY GROUNDED (or justify the difference)
```
If your medieval world HAS equality:
- What caused it? (matriarchal goddess religion? Magic negates physical strength differences?)
- Who resists it? (there's always resistance to change)
- How recent is this shift? (within living memory or ancient?)
```

---

## Integration with Plot

### World-Building Must Serve Story

**Don't create for creation's sake**. Ask: "How does this affect my characters?"

#### Example: Magic System

**Bad (Irrelevant)**:
```
Detailed magic system exists
Characters never face magical problems
Magic doesn't create conflict or solve issues
→ Cut it or make it matter
```

**Good (Integrated)**:
```
Magic system: Costs user's memories
Protagonist: Must use magic to save loved one
Conflict: Risks forgetting why they love that person
Stakes: Win the battle, lose the relationship
→ World-building creates character dilemma
```

---

## The World-Building Bible

### Document Your Decisions

Create reference document:

```markdown
# Magic System

## Core Rule
Magic is emotion-powered.

## Limitations
- Emotions fade (max 1 hour spell)
- Must be genuine (no faking)
- No necromancy (dead feel nothing)
- Exhausting (3-5 spells = burnout)

## Costs
- Emotional numbness for 24 hours
- Addiction potential
- Psychological vulnerability

## Exceptions
- Ancient artifacts store emotions (rare)
- Sociopaths can fake well enough (dangerous)

## Societal Impact
- Actors are powerful
- Therapy is illegal
- Emotional crimes exist
- Marriage = magical partnership

## Plot Hooks
- Black market for emotion-storing artifacts
- Underground therapy networks
- Emotional assassins (provoke targets for fuel)
- Political marriages for combined power
```

**Update as you write**. If you break a rule, document why.

---

## Step-by-Step Workflow

### Step 1: Identify Element to Develop (30 seconds)

Ask user:
```
What world element needs development?
- Magic/tech system?
- Social structure?
- Economic model?
- Geography/culture?
- Historical event?
```

---

### Step 2: Core Rule Definition (2 minutes)

Establish the ONE fundamental principle:
```
"Magic works by _______________."
"Society is structured around _______________."
"Technology is limited by _______________."
```

---

### Step 3: Limitations & Costs (3 minutes)

Define what CAN'T be done and what it COSTS to do what CAN:
```
LIMITATIONS:
1. [Absolute limit]
2. [Practical limit]
3. [Cultural limit]

COSTS:
1. [Physical cost]
2. [Social cost]
3. [Moral cost]
```

---

### Step 4: Exceptions (1 minute)

Add 1-2 rare exceptions (if needed):
```
EXCEPTION 1: [Rare circumstance that breaks rule]
EXCEPTION 2: [Even rarer circumstance]
```

**Rule**: Exceptions should be COSTLY or PLOT-CRITICAL.

---

### Step 5: Societal Implications (3 minutes)

Cascade effects through society:
```
If this element exists, then:
- Economy changes how? (new jobs, resources, trade)
- Politics changes how? (power distribution, laws, conflicts)
- Culture changes how? (values, taboos, art, religion)
- Daily life changes how? (travel, communication, routine)
```

---

### Step 6: Plot Integration (2 minutes)

Identify 3-5 ways this affects your story:
```
PLOT HOOK 1: [Conflict this creates]
PLOT HOOK 2: [Problem characters face]
PLOT HOOK 3: [Advantage characters can exploit]
PLOT HOOK 4: [Limitation that complicates plans]
PLOT HOOK 5: [Exception that becomes quest object]
```

---

## Example Output

### User Request:
> "Help me develop a magic system where magic is powered by pain. I want it to feel dark but logical."

### Your Response:

**WORLD ELEMENT**: Pain-Fueled Magic System

---

### LAYER 1: SURFACE (What characters experience)

```
"To cast a spell, a mage must feel pain—self-inflicted cuts, burns, or broken bones. The greater the pain, the greater the magic. Mages are recognizable by their scars."
```

---

### LAYER 2: MECHANICS (How it actually works)

**CORE RULE**:
```
Pain generates magical energy. The body's suffering is converted into raw power that can reshape reality.
```

**LIMITATIONS**:
1. **Pain must be REAL physical pain** (emotional pain doesn't work)
2. **Self-inflicted only** (pain from others generates no power)
3. **Intensity = Power** (paper cut = minor spell, broken bone = major spell)
4. **Duration limit** (pain fades → spell weakens → max 10 minutes)
5. **Death negates** (if pain kills you, spell dissipates)
6. **Healing costs more** (healing your wounds requires ADDITIONAL pain → cycle)

**COSTS**:
- **Physical**: Permanent scars, chronic pain, shortened lifespan
- **Mental**: Pain addiction, masochistic tendencies, numbness to suffering
- **Social**: Feared/avoided, seen as self-destructive, outcasts

---

### LAYER 3: IMPLICATIONS (Societal impact)

#### Economic Impact:
```
- PAINKILLER TRADE: Black market for numbing agents (illegal but widespread)
- HEALER DEBT: Healing mages charge premium (they suffer to heal you)
- SCAR ECONOMY: Old mages sell "pain lessons" to young apprentices
- BODY INSURANCE: Mages pay high premiums (likely to self-harm)
```

#### Political Impact:
```
- MAGE REGISTRATION: Government tracks all mages (dangerous individuals)
- ANTI-PAIN LAWS: Self-harm in public is illegal (prevents spellcasting)
- MILITARY VALUE: Pain-mages in army (but must be controlled/monitored)
- TORTURE PARADOX: Torturing pain-mages makes them MORE dangerous
```

#### Cultural Impact:
```
- DUAL VIEW: Mages are both heroes (sacrifice for others) and mad (hurt themselves)
- SCAR PRIDE: Some mages display scars openly (badges of power)
- HIDDEN SHAME: Others hide scars (ashamed of necessity)
- RELIGIOUS DEBATE: Is pain-magic holy (suffering) or unholy (self-harm)?
```

#### Daily Life:
```
- MAGE SHELTERS: Safe houses where mages can recover from spells
- MEDICS AS GUARDS: Healing mages stationed to prevent fatal castings
- PAIN TOLERANCE TRAINING: Young mages learn to endure without losing consciousness
- RITUAL SCARRING: Coming-of-age ceremony (first intentional pain → first spell)
```

---

### EXCEPTIONS (Rare, costly):

**EXCEPTION 1: Ancient Pain Batteries**
```
Rare artifacts that store accumulated pain. A mage can "save up" pain over time and release it later for massive spells.

CATCH: Storing too much pain corrupts the soul. Artifact users become sadistic, eventually harming others for power (breaking the self-inflicted rule through possession).
```

**EXCEPTION 2: Empathic Pain-Sharing**
```
Two mages can voluntarily bond, sharing pain between them (each feels 50%). Allows for sustainable casting (neither dies).

CATCH: If one dies, the other feels the death pain (usually fatal). Bonded mages are rare (requires absolute trust). Often romantic partners.
```

---

### PLOT HOOKS:

1. **The Pain-Numb Epidemic**
   - New drug makes pain disappear (mages lose power)
   - Government conspiracy? Enemy nation's weapon?
   - Mages must choose: keep power or end suffering

2. **The Scarless Mage**
   - Protagonist has no scars but can cast spells
   - Other mages hunt them (breaking the rules = dangerous)
   - Reveal: They're using an ancient Pain Battery (corrupting slowly)

3. **The Bonded Pair**
   - Protagonist and love interest bond (share pain)
   - Enemy captures one, tortures them
   - Other feels it, uses the pain for massive spell to rescue
   - Risk: If captured one dies, rescuer dies too

4. **The Pain Harvest**
   - Black market where mages sell "pain sessions" to non-mages
   - Rich people pay to "cast through" a mage (mage suffers, client gets spell)
   - Ethical nightmare, but lucrative (poverty-stricken mages desperate)

5. **The Painless Spell**
   - Ancient legend says there's a way to cast without pain
   - Quest to find the secret
   - Reveal: It's a lie—magic ALWAYS requires suffering (no shortcuts)

---

### CONSISTENCY CHECKS:

**Q: Can mages use anesthesia?**
A: No—numbing pain negates magic. Painkiller black market exists, but using them prevents casting.

**Q: What about people with high pain tolerance?**
A: DOESN'T MATTER. Pain is objective (nerve signal), not subjective (how much it "hurts"). Same injury = same power, regardless of tolerance.

**Q: Can you hurt someone else and take their pain?**
A: NO. Self-inflicted only. Hurting others generates no power. (Exception: Corrupted artifact users develop this ability—becoming villains.)

**Q: What about emotional pain?**
A: Doesn't work. Physical pain only. But: Emotional trauma might make a mage more willing to self-harm (psychological connection, not magical).

**Q: Can you "build up" pain resistance?**
A: Yes—training helps you STAY CONSCIOUS through pain (cast more powerful spells without fainting). But the pain itself doesn't lessen (same injury = same magic).

---

### CHARACTER IMPLICATIONS:

**Protagonist Options**:
- **Young Mage**: Just learned pain-magic, struggling with ethics (is this right?)
- **Veteran Mage**: Covered in scars, numb to pain (and to life), seeking redemption
- **Non-Mage**: Loves a pain-mage, watches them suffer, wants to find painless alternative
- **Healer**: Uses pain to heal others (suffers repeatedly for strangers, saint or fool?)

**Antagonist Options**:
- **Pain Addict**: Mage who ENJOYS suffering, increasingly dangerous as addiction grows
- **Artifact Wielder**: Uses ancient Pain Battery, corrupted into sadism
- **Anti-Mage Extremist**: Believes pain-magic is unnatural, hunts all mages
- **Pain Harvester**: Runs black-market pain sessions (exploits desperate mages)

---

### SHUANGDIAN OPPORTUNITIES:

**CAT-01: Beautiful Suffering** (Cathartic)
- Pain-magic inherently activates this pattern
- Protagonist's sacrifice (self-harm) to save others = meaningful suffering
- Channel: Endorphin (post-pain relief)
- Strength: 1.6× (high)

**MAS-02: Forbidden Technique** (Mastery)
- Using painless ancient artifact (breaking the rules)
- Protagonist exploits loophole, gains power at ethical cost
- Channel: Dopamine (clever solution)
- Strength: 1.4× (medium-high)

**FOR-03: Moral Boundary** (Forbidden)
- Bonding with another mage (intimacy through shared suffering)
- Society forbids it (too dangerous), they do it anyway
- Channel: Oxytocin (connection through vulnerability)
- Strength: 1.5× (high)

---

### FINAL WORLD-BUILDING BIBLE ENTRY:

```markdown
# Pain-Fueled Magic System

## Core Rule
Physical pain generates magical energy. Self-inflicted injury is converted into power to reshape reality.

## Limitations
- Must be REAL physical pain (emotional doesn't work)
- Self-inflicted ONLY (harm from others generates nothing)
- Intensity = Power (paper cut < broken bone)
- Duration capped (pain fades → spell weakens → 10 min max)
- Death negates spell (killing yourself = no magic)
- Healing costs MORE pain (vicious cycle)

## Costs
- Physical: Scars, chronic pain, shortened lifespan
- Mental: Addiction, masochism, emotional numbness
- Social: Feared, avoided, outcast status

## Exceptions
- Pain Batteries (ancient artifacts, store pain, corrupt user)
- Empathic Bonds (share pain between 2 mages, risky)

## Societal Impact
- Black market painkillers (illegal)
- Mage registration (government tracking)
- Pain-tolerance training (adolescent rite)
- Dual cultural view (heroic sacrifice vs. self-destruction)

## Plot Hooks
1. Pain-numb epidemic (threat to mages)
2. Scarless mage (rule-breaker hunted)
3. Bonded pair rescue (shared torture risk)
4. Pain harvest black market (exploitation)
5. Painless spell legend (quest, false hope)

## Consistency Rules
- Anesthesia blocks magic
- Pain tolerance irrelevant (same injury = same power)
- Cannot steal others' pain
- Emotional pain doesn't fuel magic
- Training increases consciousness, not power
```

---

## Integration with Other Skills

### Use Together:
- **/character-forge** - Create mages shaped by this system
- **/conflict-next** - Generate conflicts based on world rules
- **/plot-next** - Develop plot hooks from world implications
- **/consistency-check** - Verify you're following established rules

---

**Remember**: Great world-building is an ICEBERG. Show the tip, imply the depth, never dump the whole thing on the reader at once.
