5e Cards
Challenge 2: 2

Will-o'-Wisp

Tiny undead, chaotic evil

Armor Class
19
Hit Points
22 (9d4)
Speed
0 ft., fly 50 ft. (hover)
STR
1 (−5)
DEX
28 (+9)
CON
10 (+0)
INT
13 (+1)
WIS
14 (+2)
CHA
11 (+0)
Damage Resistances
acid, cold, fire, necrotic, thunder; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities
lightning, poison
Condition Immunities
exhaustion, grappled, paralyzed, poisoned, prone, restrained, unconscious
Senses
darkvision 120 ft., passive Perception 12
Languages
the languages it knew in life
Challenge
2 (450 XP)
Proficiency Bonus
+2

Consume Life. As 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.

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

Incorporeal Movement. The 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 Illumination. The 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

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

Invisibility. The 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 many for your party

Copies of the will-o'-wisp (450 XP each) against a party of four characters of the same level. Build mixed fights in the encounter builder.

Number of Will-o'-Wisp for each difficulty, party of four
Party levelEasyMediumHardDeadly
Level 2—1—2–20
Level 31—23–20
Level 4—2—3–20
Level 52345–20
Level 6234–67–20
Level 7345–67–20

In these lists

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Questions

What CR is the Will-o'-Wisp?

The Will-o'-Wisp is challenge 2, worth 450 XP, with a proficiency bonus of +2.

How many hit points does the Will-o'-Wisp have?

22 hit points (9d4), with AC 19.

How many should I use against four 2nd-level characters?

Against four level 2 characters, 1 is medium by the encounter XP budget.