Legendary Creature — Human Soldier
Colonel Autumn
Lifelink Exploit (When this creature enters, you may sacrifice a creature.) Other legendary creatures you control have exploit. Whenever a creature you control exploits a creature, put a +1/+1 counter on each creature you control.
From Magic: The Gathering.
Exact printings
Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o4ihq24bppb1h27fnzpil.