Donatello, Mutant Mechanic is a mythic Legendary Creature — Mutant Ninja Turtle card from Teenage Mutant Ninja Turtles (TMT), collector number 36. Current market price: $0.94 (foil $1.61), TCGplayer market prices via Scryfall.
{T}: Put three +1/+1 counters on target artifact you control. If it isn't a creature, it becomes a 0/0 Robot creature in addition to its other types. Activate only as a sorcery. Whenever an artifact you control is put into a graveyard from the battlefield, if it had counters on it, put those counters on up to one target artifact or creature you control.