Costume Closet

“This artifact enters with two +1/+1 counters on it.<br> T: Move a +1/+1 counter from this artifact onto target creature you control. Activate only as a sorcery.<br> Whenever a modified creature you control leaves the battlefield, put a +1/+1 counter on this artifact. <em>(Equipment, Auras you control, and counters are modifications.)</em>”