Alien Invasion

At the beginning of combat on your turn, create a 1/1 red Alien creature token with haste and "This token attacks each combat if able." Put a +1/+1 counter on it for each invasion counter on this enchantment, then put an invasion counter on this enchantment.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o8sih5o7vpb1hdalmv6g4.