Mitotic Slime is a rare Creature — Ooze card from Secret Lair Drop (SLD), collector number 2815. Current market price: $1.87 (foil $1.84), TCGplayer market prices via Scryfall.
When this creature dies, create two 2/2 green Ooze creature tokens. They have "When this token dies, create two 1/1 green Ooze creature tokens."