AI Game Master Toolkit

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Generate complete encounters with stat blocks, NPCs with backstories, and session outlines — in seconds. No card required, no friction.

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✓ D&D 5e · Pathfinder · CoC

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51 encounters generated

D&D 5e Pathfinder · CoC

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CritKit — AI Encounter Generator

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D&D 5e

AI Output

⚔ The Drowned Shaft

CR: 4 (1,100 XP) · Type: Ambush / Environmental

Combatants

6× Goblin Sapper (CR 1/4 ea, modified)
1× Bugbear War Chief (CR 3, uses Surprise)

Environment

Knee-deep water (+10ft/round). Collapsed ceiling beams (difficult terrain). 2 light sources (lanterns on walls). 60ft corridor, 30ft wide chamber at end.

Tactics

Goblins use Nimble Escape to hide behind beams after each attack. Bugbear War Chief stays at range, uses Stunning Strike if cornered. Sappers attempt to destroy the mine support posts (DC 12 Athletics to prevent). Flooding creates urgency — retreat is not an option.

Loot

220 gp, 3× Alchemist's Fire, 1× Dwarven Mining Token (plot hook)

Why CritKit

Built for the GM in the arena.

Not a random table generator. Not a glorified search engine. CritKit generates table-ready encounters, NPCs with soul, and structured session plans — in seconds.

⏱

Stop Prepping.
Start Playing.

The average DM spends 8–12 hours on prep per session. CritKit gets you from blank page to table-ready in under 30 minutes — with encounters, NPCs, and session plans your players will actually remember.

8-12hrs → 30 min

🎭

NPCs with
Real Backstories.

Not stat blocks with names attached. CritKit generates NPCs with personality, motivation, dialogue hooks, and plot threads your party can pull. Your villains will have plans. Your merchants will have secrets.

Merchant · Villain · Ally · Quest-giver

📋

Session Outlines —
Editable. Not Magic.

Full session plans with scene beats, key NPCs, encounters, loot, and next-session hooks. Every section editable inline — tweak any scene without regenerating the whole session.

⭐ Session outlines · Inline editing · Pro

Product Demo

Real output. Ready to run.

Everything CritKit generates is table-ready. No editing required — unless you want to.

The Drowned Shaft

Ambush encounter · Underground · Level 4 party

CR 4 1,100 XP Ambush Environmental

Combatants

Goblin Sappers ×6CR 1/4 · 10 HP each
Bugbear War ChiefCR 3 · 65 HP
—Initiative +2 / +1

Key Stats

AC (Sappers)13 (leather)
AC (War Chief)17 (chain mail)
Speed30ft / 30ft
Passive Perception9 / 11

Terrain & Hazards

💧 Rising water (+10ft/round) 🪵 Collapsed beams (difficult terrain) 🕯 Flickering lanterns (dim light) ⚠ Unstable support posts (DC 12 Athletics) 🚪 One exit — 60ft north

GM Tactics Notes

Goblins use Nimble Escape to hide after each attack, forcing players to spend actions searching. The Bugbear War Chief stays at range (30ft) and targets the party's caster with Javelin attacks. If cornered, it expends its Stunning Strike equivalent to incapacitate for one round. Sappers attempt to destroy support posts on their turns — if two posts fall, the ceiling drops (3d6 bludgeoning, DC 14 Dex half) and cave-in blocks the retreat path. The rising water forces urgency: party must reach the exit within 4 rounds or begin making Con saves.

Bugbear War Chief

Large humanoid (goblinoid), chaotic evil

Armor Class17 (chain mail, shield)

Hit Points65 (10d10 + 10)

Speed30 ft.

STR

(+5)

DEX

(+2)

CON

(+1)

INT

(+0)

WIS

(+0)

CHA

(+0)

Saving ThrowsStr +7, Dex +4

SkillsAthletics +7, Stealth +6, Intimidation +2

SensesDarkvision 60 ft., Passive Perception 10

LanguagesCommon, Goblin

Challenge3 (700 XP)

Brute.

A melee weapon deals one extra die of its damage when the bugbear hits with it (included in attacks).

Surprise Attack.

If the bugbear surprises a creature and hits it with an attack during the first round, the target takes an extra 14 (4d6) damage.

Actions

Multiattack.

Makes two melee attacks.

Morningstar.

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) piercing damage.

Javelin.

Melee or Ranged Weapon Attack: +7 to hit, reach 5 ft. or range 30/120 ft. Hit: 12 (2d6 + 5) piercing damage.

Every monster, ready to run.

CritKit generates complete, mechanically correct stat blocks for every creature in your encounter — balanced to your party's level and optimized for the specific battlefield.

Full ability scores with calculated modifiers
CR-appropriate AC, HP, and attack bonuses
Multiattack, special abilities, and legendary actions where applicable
Tactical notes specific to your encounter context
Works with D&D 5e, Pathfinder, and homebrew systems
Save to your encounter library — reuse forever

Thornwick Caulder

Human Merchant · Neutral Good · Level 3 Commoner

Merchant Quest Giver

STAT BLOCK

AC10

HP12 (2d8+4)

Speed30 ft.

STR

DEX

CON

INT

WIS

CHA

SkillsInsight +2, Persuasion +5, Deception +3

LanguagesCommon, Dwarvish

ACTIONS

Shopkeeper's Wit.

Thornwick can read a party composition and instinctively know who's broke and who's loaded. Grants advantage on Persuasion checks for trade-related negotiations.

PERSONALITY TRAITS

✦Speaks in carefully measured sentences; every word costs something

✦Always polishing a brass compass he inherited from his father

✦Keeps a ledger that is three years overdue

BACKSTORY

Thornwick's family ran the Caulder Trading Post for three generations on the north road — a vital waystation for caravans moving between the mountain passes and the coastal cities. When a mine collapse sealed the western pass two years ago, his suppliers dried up, his debt mounted, and his suppliers stopped answering letters. He's been quietly liquidating inventory to stay afloat, and he's two payments behind on his father's land deed. He knows something about why the mine collapsed — something he hasn't told anyone.

DIALOGUE HOOKS

If asked about inventory shortages:

"The Crimson Ridge collapse was six months ago. You'd think the Guild would have cleared it by now. They haven't. I'm told there's something wrong with that mine — beyond just rock."

If pressed on his financial troubles:

"I'm two payments behind on my father's deed. Two. The banker's daughter in Millhaven has been very patient — because her father is very patient. I've kept them both waiting long enough."

If the party offers to help:

"The Caulder ledger has... irregularities. Numbers that don't add up after the collapse. I've been afraid to look too closely at them. If someone were to investigate — quietly — I would make it worth their while."

PLOT HOOKS

Investigation The mine collapse may not have been natural. Investigate Crimson Ridge.

Debt & Favor The banker's patience has limits. Clear the debt or pay a price.

Family Secret Thornwick's father's compass leads somewhere the mine maps don't show.

⭐ Pro Subscriber Feature

The Crimson Ridge Collapse

Session Outline · 3-Hour Block · Levels 5–6

Dramatic 3 Scenes

PREMISE

The party arrives in Millhaven to resupply and discovers that the only road to the northern territories is blocked — and that the mine collapse that caused it may not have been an accident. Thornwick Caulder, a debt-laden merchant, is the key to understanding what really happened beneath Crimson Ridge. What they find there will reshape the power dynamics of the entire region.

Scene 1

Roleplay / Investigation

The Merchant's Ledger

Key NPCs

Thornwick Caulder · Millhaven Innkeeper · Banker's Daughter (Elara)

Scene Beats

Party arrives in Millhaven, finds inn at capacity — Thornwick's credit still works
Thornwick offers to share ledger discrepancies in exchange for discretion
Elara appears mid-conversation — she's been watching Thornwick too
Revelation: Mine collapse happened 3 days after a sealed shipment from the east

Encounters

Optional: Street confrontation with debt collectors (CR 1–2)

Loot / Rewards

Millhaven Inn tab cleared (10 gp value), Elara's contact (future quest hook)

Scene 2

Combat / Exploration

The Crimson Ridge Entrance

Key NPCs

Mine Foreman (suspicious) · Collapsed Miners (turned hostile) · Cave Troll (CR 5)

Scene Beats

Party reaches the mine entrance — Foreman warns them off ("sealed by order of the Guild")
Stealth or social approach through the ventilation shaft (narrow passage)
Cave Troll encounter in the collapsed main shaft
Discover: Mine was deliberately sealed from inside after the collapse — someone was trapping survivors

Encounters

Cave Troll (CR 5) · Mine Foreman's guards ×4 (CR 1/8)

Loot / Rewards

Trollhide armor materials (150 gp craft value), 1× Sealed Mine Manifest (plot-critical)

Scene 3

Social / Climax

The Guild's Silence

Key NPCs

Guild Arbiter Maren Blackwood · Thornwick Caulder · Elara (alliance confirmed)

Scene Beats

Party returns to Millhaven with evidence — Guild has frozen Thornwick's accounts
Confrontation with Arbiter Blackwood: she controls the regional trade routes
Thornwick must choose: stay safe, or expose the Guild and lose everything
Climax: Party and Thornwick expose the conspiracy at the Millhaven town hall (public persuasion check)

Encounters

No combat — social encounter with faction stakes (Persuasion / Intimidation / Deception DC 18)

Loot / Rewards

Thornwick's undersea trade route access unlocked (+200 gp/session passive income), Guild Watch Standing (future faction)

NEXT SESSION HOOK

The sealed mine manifest leads to a shipping company called the Drowned Holds — based in the coastal city of Velmoor. The party now has a reason to travel north and investigate the true extent of the Guild's corruption.

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