Metalhead is a uncommon Legendary Artifact Creature — Robot Turtle card from Teenage Mutant Ninja Turtles (TMT), collector number 44. Current market price: $0.14 (foil $0.28), TCGplayer market prices via Scryfall.
When Metalhead enters, return up to one other target artifact or creature to its owner's hand. {R}, Sacrifice another artifact: Put a +1/+1 counter on Metalhead. He gains menace and haste until end of turn.