Oran-Rief Ooze is a rare Creature — Ooze card from Foundations Jumpstart (J25), collector number 693. Current market price: $0.30, TCGplayer market prices via Scryfall.
When this creature enters, put a +1/+1 counter on target creature you control. Whenever this creature attacks, put a +1/+1 counter on each attacking creature with a +1/+1 counter on it.