Ooze, Foxfire

Smelling a bit like ozone and looking like a cloud of glowing lights, this ooze is filled with strange lines of dots and nerve-like filaments.

Large ooze, unaligned

Armor Class 9
Hit Points 126 (12d10 + 60)
Speed 20 ft., climb 20 ft., swim 20 ft., fly 10 ft. (hover)

19 (+4) 8 (-1) 20 (+5) 2 (-4) 6 (-2) 1 (-5)

Damage Vulnerabilities cold
Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities acid, fire, lightning
Condition Immunities blinded, charmed, deafened, exhaustion, frightened, prone
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 8
Challenge 10 (5,900 XP)

Special Traits

  • Ambusher. The ooze has advantage on attack rolls against any creature it has surprised.
  • Amorphous. The ooze can move through a space as narrow as 1 inch wide without squeezing.
  • Lightning Storm. A creature that touches the ooze while wearing metal or hits it with a melee attack with a metal weapon takes 9 (2d8) lightning damage and triggers a lightning storm. All creatures within 20 feet of the ooze that are holding or wearing metal must succeed on a DC 16 Dexterity saving throw or take 9 (2d8) lightning damage.
  • Ooze Nature. A foxfire ooze doesn’t require sleep.
  • Spider Climb. The ooze can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.


  • Multiattack. The foxfire ooze makes three pseudopod attacks.
  • Pseudopod. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 20 (3d10 + 4) bludgeoning damage plus 4 (1d8) lightning damage.


Cloud of Glowing Lights. From a distance, a foxfire ooze often resembles swamp gas or a cloud of fireflies. Its amorphous shape is filled with tiny glowing lights, generally green or yellow but sometimes orange, blue, purple, or even pink. A potential prey’s curiosity is often what brings it close enough to strike.

Natural Swimmers. Foxfire oozes are able to swim for short distances. Some even use ponds, slow-moving streams, or underground pools as lairs and breeding areas.

Open Sky Hunter. Foxfire oozes are not relegated to caverns and dim sewers and are often found in rivers, forests, marshlands, and even sometimes in open plains, especially when storms threaten. A foxfire ooze encountered during a lightning storm is particularly aggressive.

Section 15: Copyright Notice

Creature Codex. © 2018 Open Design LLC; Authors Wolfgang Baur, Dan Dillon, Richard Green, James Haeck, Chris Harris, Jeremy Hochhalter, James Introcaso, Chris Lockey, Shawn Merwin, and Jon Sawatsky.