Will-o'-WispCR 2 · Tiny Undead · Stat Block & Encounter Builder

Tiny undead, Challenge 2. AC 19, 22 hit points.

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Armour Class

Hit Points

Speed

0 ft.

Challenge

2 · 450 XP

Alignment

Chaotic Evil

The card

Stat Block

Tiny Undead · Chaotic Evil

Will-o'-Wisp

9d4 · 0 ft., fly 50 ft., (hover)

Darkvision 120 ft., passive Perception 12

Languages: the languages it knew in life

STR	DEX	CON	INT	WIS	CHA
1 (-5)	28 (+9)	10 (+0)	13 (+1)	14 (+2)	11 (+0)

Traits

Damage ResistancesAcid, cold, fire, necrotic, thunder, bludgeoning, piercing, and slashing from nonmagical weapons

Damage ImmunitiesLightning, poison

Condition ImmunitiesExhaustion, Grappled, Paralyzed, Poisoned, Prone, Restrained, Unconscious

Consume LifeAs a bonus action, the will-o'-wisp can target one creature it can see within 5 ft. of it that has 0 hit points and is still alive. The target must succeed on a DC 10 Constitution saving throw against this magic or die. If the target dies, the will-o'-wisp regains 10 (3d6) hit points.

EphemeralThe will-o'-wisp can't wear or carry anything.

Incorporeal MovementThe will-o'-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.

Variable IlluminationThe will-o'-wisp sheds bright light in a 5- to 20-foot radius and dim light for an additional number of ft. equal to the chosen radius. The will-o'-wisp can alter the radius as a bonus action.

Actions

ShockMelee Spell Attack: +4 to hit, reach 5 ft., one creature. Hit: 9 (2d8) lightning damage.

InvisibilityThe will-o'-wisp and its light magically become invisible until it attacks or uses its Consume Life, or until its concentration ends (as if concentrating on a spell).

How to actually run it

Tactics

The stat block tells you what it can do. This tells you what to do with it.

1With a 50 ft. flying speed it can stay out of melee reach; a party with no ranged answer will chase it all fight.

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Encounter Difficulty

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How bad is this fight?

Real DMG maths — XP thresholds by level, and the group multiplier that makes crowds so much worse than the raw total suggests.

Will-o'-Wisps4Party size4Party level3

Could kill someone — and at high enough numbers, the whole party.

Difficulty

Deadly

3,600 adj. XP · ×2

deadly at 1,600

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Counsel

Will-o'-Wisp, Answered

What is Will-o'-Wisp's challenge rating in D&D 5e?

Will-o'-Wisp is Challenge 2, worth 450 XP. Encounter maths multiplies XP by the number of monsters, so a group is deadlier than the raw total — use the calculator on this page.

What are Will-o'-Wisp's stats?

AC 19, 22 hit points (9d4), speed 0 ft., fly 50 ft., (hover). Ability scores: STR 1, DEX 28, CON 10, INT 13, WIS 14, CHA 11.

What is Will-o'-Wisp resistant to?

Will-o'-Wisp is immune to lightning and poison damage, and resistant to acid, cold, fire, necrotic, thunder and bludgeoning, piercing, and slashing from nonmagical weapons. Pick a damage type it does not shrug off.

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