Agent skill

encounter-balance

This skill should be used when the user asks to "check encounter balance", "review CR", "is this too hard", "is this too easy", "balance my encounters", "encounter difficulty", "TPK check", "deadly encounter", "party level check", or mentions "challenge rating", "encounter math", or "XP budget". Analyzes module encounters against party composition using D&D 5e math to identify deadly, trivial, or unbalanced fights.

Stars 18
Forks 1

Install this agent skill to your Project

npx add-skill https://github.com/mimir-dm/mimir/tree/main/crates/mimir-mcp/plugin/skills/encounter-balance

SKILL.md

Encounter Balance Review

Purpose

Analyze encounters in modules against expected party composition to identify deadly, trivial, or unbalanced fights using D&D 5e encounter math.

Analysis Process

1. Establish Party Parameters

Ask for or assume:

  • Number of players (default: 4)
  • Average party level
  • Party composition (optional, for tactical analysis)

2. Gather Encounter Data

get_campaign_details()
list_modules()
# For each module:
get_module_details(module_id: module_id)
# Extract monster list with counts

# Also check maps for token placements
list_maps(module_id: module_id)
get_map(map_id: map_id)  # includes token positions

Important: Verify the module exists and has monsters before analysis. If a monster is not found in the catalog via search_catalog(category: "monster"), flag it as homebrew.

3. Calculate Per Encounter

For each encounter:

  1. Sum base XP — Add XP for each monster by CR (see references/5e-encounter-math.md)
  2. Apply multiplier — Based on monster count
  3. Compare to thresholds — Determine difficulty category
  4. Flag concerns — Deadly, trivial, or resource-draining

4. Adventuring Day Analysis

D&D 5e assumes 6-8 medium encounters per long rest. Calculate:

  • Total adjusted XP across module
  • Expected adventuring days
  • Resource pressure (will the party run out of spell slots?)

Output Format

markdown
# Encounter Balance Report: [Module Name]
**Party**: [X] players, level [Y]

## Daily XP Budget
- Easy threshold: [X] XP
- Medium threshold: [X] XP
- Hard threshold: [X] XP
- Deadly threshold: [X] XP
- Daily budget: [X] XP (6-8 medium encounters)

## Encounter Analysis

### [Encounter Name/Location]
| Monster | CR | Count | Base XP |
|---------|-----|-------|---------|
| [Name] | [CR] | [N] | [XP] |

- **Total Base XP**: [X]
- **Adjusted XP** (x[multiplier]): [X]
- **Difficulty**: [Easy/Medium/Hard/Deadly]
- **Assessment**: [Notes]

### Summary

| Encounter | Difficulty | Adjusted XP | Concern |
|-----------|------------|-------------|---------|
| [Name] | Deadly | 5,400 | [WARNING] TPK risk |
| [Name] | Easy | 200 | Filler |
| [Name] | Hard | 2,100 | Good challenge |

## Concerns

### Deadly Encounters
- [Encounter]: [Why it's dangerous] -> [Suggestion]

### Trivial Encounters
- [Encounter]: [Why it's too easy] -> [Suggestion]

### Resource Pressure
- Module contains [X] adjusted XP
- Expected adventuring days: [Y]
- Assessment: [Over/under tuned]

## Recommendations
1. [Specific adjustment]
2. [Specific adjustment]

Interactive Mode

  1. Ask for party composition
  2. Present module-by-module analysis
  3. For deadly encounters, offer alternatives:
    • "This encounter is deadly. Should I suggest monster substitutions?"
    • Search catalog for CR-appropriate alternatives
  4. For trivial encounters, suggest enhancements

Reference Data

For XP thresholds, CR-to-XP tables, and encounter multipliers, see references/5e-encounter-math.md.

Expand your agent's capabilities with these related and highly-rated skills.

mimir-dm/mimir

mimir-dm

This skill should be used when the user asks to "create a D&D campaign", "make a new module", "add an NPC", "create an encounter", "search for monsters", "find D&D items", "search for spells", "list campaigns", "set up a dungeon crawl", "create a mystery adventure", "add loot to characters", "search for traps", "manage character inventory", "build an adventure", "populate a dungeon", "give items to players", "create a villain", "add treasure", "write session notes", "create campaign document", "add world lore", "campaign-level document", "upload a map", "place tokens", "level up character", "set ability scores", "set currency", "search races", "search classes", "search backgrounds", "search feats", "search conditions", "delete module", "delete character", "delete document", "create campaign", "export campaign", "import campaign", "homebrew item", "homebrew monster", "homebrew spell", "create custom monster", "create custom item", "create custom spell", "clone monster", "clone item", "clone spell", or mentions "Mimir campaign", "D&D 5e authoring", or "dungeon master tools". Provides MCP tools for campaign management, module creation, NPC authoring, character management, map/token placement, document management, homebrew content creation, and catalog searching.

18 1
Explore
mimir-dm/mimir

pressure-test

This skill should be used when the user asks to "pressure test my campaign", "stress test this module", "find plot holes", "what if players do X", "test my adventure", "challenge my scenario", "poke holes in my plot", "adversarial review", "player-proof this", or mentions "edge cases", "breaking the campaign", or "unexpected player actions". Adopts an adversarial player mindset to find plot holes, dead-ends, and exploits before game time.

18 1
Explore
mimir-dm/mimir

loot-audit

This skill should be used when the user asks to "audit loot", "check treasure distribution", "review magic items", "is loot balanced", "treasure by level", "too much gold", "not enough magic items", "wealth check", or mentions "treasure placement", "loot tables", or "magic item distribution". Audits treasure and magic item placement across modules and character inventories to flag wealth imbalances, rarity mismatches, and loot gaps.

18 1
Explore
mimir-dm/mimir

npc-network

This skill should be used when the user asks to "map NPC relationships", "show character connections", "analyze NPC network", "who knows who", "faction relationships", "visualize NPCs", "NPC web", "character relationship map", or mentions "NPC connections", "social network", or "faction dynamics". Maps relationships between NPCs by faction, location, and document references to identify hub characters, isolated NPCs, and missing connections.

18 1
Explore
mimir-dm/mimir

mapgen

This skill should be used when the user asks to "generate a map", "create a dungeondraft map", "make a battle map", "generate terrain", "create a forest map", "make a cave map", "grassland map", "desert map", "lake map", "arctic map", "island map", "tropical island", "procedural map", "mapgen", "map from preset", "map from YAML", "validate map config", "list map presets", "generate dungeondraft", "create outdoor map", "random map", "noise-based map", "map with rooms", "dungeon map", "generate rooms", "room layout", "polygon layout", "polygon rooms", "overlapping rooms", or mentions "mimir-mapgen", "dungeondraft_map", "biome preset", or "map generation". You act as a creative director — translating the user's scene descriptions into precise generation parameters that produce the terrain and room layouts they envision.

18 1
Explore
mimir-dm/mimir

session-prep

This skill should be used when the user asks to "prep for session", "review before game night", "session checklist", "am I ready to run this", "pre-session review", "game prep", "DM prep check", or mentions "running tonight", "session tomorrow", or "game day prep". Runs a comprehensive pre-session checklist covering content, NPC readiness, encounter balance, and contingency planning.

18 1
Explore

Didn't find tool you were looking for?

Be as detailed as possible for better results