Consuming Ferocity

Enchant non-Wall creature Enchanted creature gets +1/+0. At the beginning of your upkeep, put a +1/+0 counter on enchanted creature. If that creature has three or more +1/+0 counters on it, it deals damage equal to its power to its controller, then destroy that creature and it can't be regenerated.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o2gwj0iyppb1hwmg2sj9u.