The Heart Mimic or A Bad Memory (in-game name Pahan muisto) is a rare mimic enemy, that uses its resemblance to a Extra Max Health pickup to lure in players and bite them, dealing 30–40 damage.
There is a 0.11% chance of finding them from Treasure Chests.
Trivia
- Pahan Muisto means "memory of [an] evil" in Finnish