Biogenic Ooze is a mythic Creature — Ooze card from Ravnica Allegiance Promos (PRNA), collector number 122p. Current market price: $6.24 (foil $6.99), 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.