March of the World Ooze

Creatures you control have base power and toughness 6/6 and are Oozes in addition to their other types. Whenever an opponent casts a spell, if it's not their turn, you create a 3/3 green Elephant creature token.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o5ate2rdvpb1hldmgwea8.