Knuckles, the Echidna

+1: Create 1 chaos emerald token. Create one more token for every hedgehog on the battlefield. If the Master Emerald is active draw a card instead.
-2: If Master Emerald is active, Knuckles becomes an 8/5 creature with Menace, Trample until end of turn. If Knuckles dies, lose 1 loyalty instead.
-7: If Destroyed Master Emerald is on the battlefield, flip it over.