Will-o'-Wisp
small undead, chaotic evil
AC 19 (natural armor)
Initiative +9 (19)
HP 27
Speed 5 ft., Fly 50 ft. (hover)
Resistances acid, cold, fire, necrotic
Immunities lightning, poison, exhaustion, grappled, paralyzed, petrified, poisoned, prone, restrained, unconscious
Senses Darkvision 120 ft. Passive Perception 12
Languages common plus one other language
CR 2 (XP 450; PB +2)
Traits
Ephemeral. The wisp can't wear or carry anything.
Illumination. The wisp sheds Bright Light in a 20-foot radius and Dim Light for an additional 20 feet.
Incorporeal Movement. The wisp can move through other creatures and objects as if they were Difficult Terrain. It takes 5 (1d10) Force damage if it ends its turn inside an object.
Actions
Shock. Melee Attack Roll: +4, reach 5 ft. Hit: 11 (2d8 + 2) Lightning damage.
Will-o'-Wisp is from the System Reference Document 5.2.1 (“SRD 5.2.1”) by Wizards of the Coast LLC, used under the Creative Commons Attribution 4.0 International License. Full attribution is on the Licenses & Attribution page.