Nine Lives + Fractured Identity + Cloudsteel Kirin + Cleansing Nova

Nine Lives

Fractured Identity

Cloudsteel Kirin

Cleansing Nova

How it works

1. Cast Fractured Identity by paying 3, exiling Nine Lives and causing each opponent to create a token copy of it.
2. Nine Lives leaves the battlefield, however you cannot lose the game due to Cloudsteel Kirin.
3. Cast Cleansing Nova by paying its mana cost, destroying all enchantments.
4. When each opponent's Nine Lives leaves the battlefield, they each trigger, causing each opponent to lose the game.