Mitotic Slime is a rare Creature — Ooze card from Planechase 2012 (PC2), collector number 67. Current market price: $0.43, 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."