Cast Transcendence by paying {3}{W}{W}{W}.
Transcendence triggers due to you having 20 or more life. However, you cannot lose the game due to Herald of Eternal Dawn.
Step 2 repeats in an infinite loop, causing the game to end in a draw if it isn't interacted with.

Draw the game

Transcendence

Herald of Eternal Dawn

Cast Fractured Identity by paying {3}{W}{U}, exiling Nine Lives and causing each opponent to create a token copy of it.
Nine Lives leaves the battlefield, however you cannot lose the game due to Herald of Eternal Dawn.
Cast Austere Command by paying its mana cost, destroying all enchantments.
When each opponent's Nine Lives leaves the battlefield, they each trigger, causing each opponent to lose the game.

Combos with "Herald of Eternal Dawn"