Ant-Man, Colony Commander is a uncommon Legendary Creature — Human Rogue Hero card from Marvel Super Heroes (MSH), collector number 201. Current market price: $0.19 (foil $0.26), TCGplayer market prices via Scryfall.
Whenever Ant-Man attacks, you may pay {1}. When you do, put a +1/+1 counter on target creature. Whenever you put a +1/+1 counter on a creature, create a 1/1 green Insect creature token. This ability triggers only once each turn.