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Detonate enemies on kill.
On killing an enemy, spawn a lava pillar in a 12m (+2.4m per stack) radius for 350% (+280% per stack) base damage.
Rarity Uncommon
Category Damage
ID 4
Stat Value Stack Add
Damage 350% Linear +280%
Radius 12m Linear +2.4m

The Will-o'-the-wisp is a returning item in Risk of Rain 2. The creature inside is a mystery to those in possession of it, it doesn't seem to eat nor does it make any attempt to leave the jar.

The explosion generated this way can crit. This is based on your crit chance. The explosion has a Proc Coefficient of 1.

Wisps Damage % Range
1 350% 12m
2 630% 14.4m
3 910% 16.8m
4 1190% 19.2m
5 1470% 21.6m
10 2870% 33.6m
25 7070% 69.6m
50 14070% 129.6m
100 28070% 249.6m

Lore[edit | edit source]

Audio transcription complete from portable recorder.


"You don’t want to re-name it Bill-o-the-Wisp?"
"Then what about FLARE-ed?"
"It needs a name, it’s no dif-FIRE-ent than you or me."
"Next time we’re at base I’m applying for a transfer."
"You know that won’t go through until at least Dec-EMBER."
"How long have you been waiting to use these?"
"Coming up with them on the spot. I’ve got a good head on my SMOULDERS."
"You can stop emphasizing those words so much. I get it."
"I will never stop FUELING around."
"Want to grab something to eat when we get back?"
"Thank the stars that’s over, yes. I hope they’re not serving that gruel we had yesterday."
"Maybe they’ll cook you a pep-PYRO-ni pizza?"
"Hey, wait up! I can’t run holding this thing, it might go off!"