Ooze Flux is a rare Enchantment card from Gatecrash (GTC), collector number 128. Current market price: $0.30 (foil $0.82), TCGplayer market prices via Scryfall.
{1}{G}, Remove one or more +1/+1 counters from among creatures you control: Create an X/X green Ooze creature token, where X is the number of +1/+1 counters removed this way.