Cast Fractured Identity by paying {3}{W}{U}, exiling Nine Lives and causing each opponent to create a token copy of it.
Nine Lives triggers. Holding priority, cast Back to Nature by paying its mana cost, destroying all enchantments.
Each opponent's Nine Lives leaves the battlefield, causing them to lose the game.

Each opponent loses the game

Nine Lives

Fractured Identity

Back to Nature

On opponent's end step before your turn, cast Back to Nature by paying {1}{G}, destroying all enchantments.
Oblivion Ring leaves the battlefield, triggering its second ability, returning Barren Glory from exile to the battlefield.
At the beginning of your upkeep, Barren Glory triggers, causing you to win the game.

Combos with "Back to Nature"