KrumpyCard Info

Name: Krumpy

Type: Champion

Toughness: 8

Text: Whenever an opponent uses a mercenary card, put a naughty counter on their champion. At the end of the game, before players reveal their hands, each champion takes damage equal to the number of naughty counters on them.

Set: Limited Edition Standalone

You can use anything as a naughty counter. I personally recommend a black d6. When the damage is taken at the end of the game, it happens in one single damage instance per champion.