opendungeon

Monster types

Monsters should teach the player how the dungeon works. Early enemies explain movement and positioning. Later enemies pressure resource use, targeting, and escape decisions.

Monstrary

The Book has a Monsters tab for the Monstrary. A monster entry appears when combat starts. Weaknesses are hidden until you hit that monster with the right attack affinity. When that happens, the game shows a weakness toast and writes the new note into the Book.

Slime

  • Behavior: slow pursuit and corridor blocking.
  • Weaknesses: Arcane and Precision.
  • Resistance: Physical.
  • Strategy: use Arcane Burst or Aimed Shot before it pins you.

Ghoul

  • Behavior: direct chase with punishing contact damage.
  • Weakness: Holy.
  • Resistance: Shadow.
  • Strategy: Smite is the clean answer; guard before trading hits at low HP.

Necromancer

  • Behavior: ranged pressure, often protected by rust squires.
  • Weaknesses: Holy and Physical.
  • Resistances: Shadow and Arcane.
  • Strategy: close distance, break guards, then use Smite or Strike.

Rust squire

  • Behavior: guard pattern that protects casters and bosses nearby.
  • Weaknesses: Arcane and Shadow.
  • Resistances: Physical and Precision.
  • Strategy: crack armor with Arcane Burst or Shadow Hex.

Gallows wisp

  • Behavior: stalker movement that pressures lines of sight.
  • Weaknesses: Shadow and Luck.
  • Resistance: Physical.
  • Strategy: use Shadow Hex or Lucky Riposte when normal weapon timing feels wrong.

Carrion moth

  • Behavior: fragile, evasive movement that flees when hurt.
  • Weaknesses: Precision and Luck.
  • Resistance: Holy.
  • Strategy: pin it with Aimed Shot before it wastes turns.

Crypt mimic

  • Behavior: ambush threat hidden around loot routes.
  • Weaknesses: Physical and Holy.
  • Resistance: Precision.
  • Strategy: use Strike or Smite after it reveals itself.

Grave-root boss

  • Behavior: phase-shifting boss that grows meaner after half HP.
  • Weaknesses: Holy and Arcane.
  • Resistance: Shadow.
  • Strategy: save focus for phase two and finish with Smite or Arcane Burst.