Foxfire Ooze 2014
CR 10 ooze
Large ooze, unaligned
The ooze has advantage on attack rolls against any creature it has surprised.
The ooze can move through a space as narrow as 1 inch wide without squeezing.
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.
The ooze can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Actions
The foxfire ooze makes three pseudopod attacks.
Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 20 (3d10 + 4) bludgeoning damage plus 4 (1d8) lightning damage.
Source: Creature Codex (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details