Chromium, Vengeful Elder

Flying
At the beginning of your upkeep, pay {w}{u}{b} or destroy Chromium. It can't be regenerated.
Whenever Chromium attacks, it gains double strike, menace, and hexproof until end of turn.
Eminence - As long as Chromium is in the command zone or on the battlefield, at the beginning of combat on your turn, target creature you control gains first strike, fear, and shroud until end of turn.