Conformer Shuriken is a rare Legendary Artifact — Equipment card from Final Fantasy Commander (FIC), collector number 127. Current market price: $1.14 (foil $2.57), TCGplayer market prices via Scryfall.
Equipped creature has "Whenever this creature attacks, tap target creature defending player controls. If that creature has greater power than this creature, put a number of +1/+1 counters on this creature equal to the difference." Equip {2}