MonsterGen

MonsterGen is based on Fortuna and Storm by Robert Sharp.

• Fortuna: Random Value Toolkit for Generative Modeling.
• Storm: High-performance Random Number Engine.

Installation

$ pip install MonsterGen

Index

• CR
• Random Monsters
• Random NPCs
• Random Traps
• Random Treasure

CR Class

CR(cr) -> CR

• cr: required int, -3 to 30

The CR class is a numeric system representing the relative power of a monster in D&D 5e. This system is a bit funky with values below 1, be careful... here be dragons! CR less than 1 are printed as fractions but valued mathematically as integers [-3, 0]. See below:

CR Mapping

from MonsterGen import CR

print(f"CR: {CR(-3)}")
print(f"CR: {CR(-2)}")
print(f"CR: {CR(-1)}")
print(f"CR: {CR(0)}")
print(f"CR: {CR(1)}")
print(f"CR: {CR(2)}")
print(f"CR: {CR(3)}")
print('...')
print(f"CR: {CR(30)}")

CR: 1/16
CR: 1/8
CR: 1/4
CR: 1/2
CR: 1
CR: 2
CR: 3
...
CR: 30

Party Adapter Class Method

CR.player_adapter(average_level, num_players=5, difficulty=0) -> CR

Class method for computing CR from party composition and difficulty setting.

• average_level: required int, 1 to 20
• num_players: optional int, 1 to 9
• difficulty: optional int, -5 to 5
  • Stupid Easy: -5 to -4
  • Easy: -3 to -2
  • Normal: -1 to 1
  • Epic: 2 to 3
  • Legendary: 4 to 5

Monster Class

Monster(cr, monster_type=None) -> Monster

• cr: required int, -3 to 30
• monster_type: optional str, ["Aberration", "Beast", "Celestial", "Construct", "Dragon", "Elemental", "Fey", "Fiend", "Giant", "Humanoid", "Monstrosity", "Plant", "Ooze", "Undead"]

from MonsterGen import Monster, CR

monster_cr = CR(10)
print(Monster(monster_cr, monster_type='Aberration'))

Name: Grell
Type: Aberration
CR: 7
Hit Points: 164
Armor Class: 12
Attack Bonus: 9
Typical Damage: 45 - 50
Save DC: 15
XP Value: 2900

NPC Class

Npc() -> Npc

Produces a random NPC.

from MonsterGen import Npc

print(Npc())

Profession: Bookbinder
Race: Tiefling
Background: Soldier
Appearance: Flamboyant or outlandish clothes
Mannerism: Speaks in rhyme
Hit Points: 8
Armor Class: 11
Damage: 1

Random Trap Factory Function

random_trap(cr, dam_type=None) -> Trap

• cr: required int, -3 to 30
• dam_type: optional str, ['bludgeoning', 'falling', 'piercing', 'slashing', 'poison', 'acid', 'fire', 'lightning', 'cold', 'necrotic']

Produces a random trap. If dam_type is None it will choose a random damage type.

from MonsterGen import random_trap

print(random_trap(10, dam_type="fire"))

Name: Inferno
Type: Minor Trap
CR: 10
Spot & Disarm: DC: 10
Save vs: WIS DC 11 for half damage
Damage: 3d4 fire
Disarm XP: 5900

Monster Loot Factory Function

monster_loot(cr) -> Loot

• cr: required int, -3 to 30

Produces random treasure for a single monster. Typically this is just coinage.

from MonsterGen import monster_loot

print(monster_loot(10))

Copper Coins: 1800
Electrum Coins: 50

Horde Loot Factory Function

horde_loot(cr) -> Loot

• cr: required int, -3 to 30

Produces random treasure for a boss or horde of monsters. High-quality loot with magic items appropriate to the CR.

from MonsterGen import horde_loot

print(horde_loot(10))

Copper Coins: 400
Silver Coins: 7000
Gold Coins: 2200
Platinum Coins: 140
Jewels: 50 GP
Oil of etherealness
Quaal's feather token