Junk Golem

Junk Golem

Artifact Creature - Golem (CMC 4)
Junk Golem enters the battlefield with three +1/+1 counters on it.
At the beginning of your upkeep, sacrifice Junk Golem unless you remove a +1/+1 counter from it.
, Discard a card: Put a +1/+1 counter on Junk Golem.