Biogenic Ooze is a mythic Creature — Ooze card from Ravnica Allegiance (RNA), collector number 122. Current market price: $1.16 (foil $5.03), TCGplayer market prices via Scryfall.
When this creature enters, create a 2/2 green Ooze creature token. At the beginning of your end step, put a +1/+1 counter on each Ooze you control. {1}{G}{G}{G}: Create a 2/2 green Ooze creature token.