Donatello, Mutant Mechanic

Legendary Creature — Mutant Ninja Turtle{3}{U}3/5

{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.

Colour identity Blue · Commander page

In short

Donatello, Mutant Mechanic has 3 listed printings; the most valuable is the Borderless · Stamped printing from TMT at US$2,234 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.