Cast Mirrorform by paying {4}{U}{U}, causing each nonland permanent you control to become a copy of Biovisionary.
At the beginning of your end step, each Biovisionary you control triggers.
Resolve the first Biovisionary trigger, causing you to win the game.

Win the game

Biovisionary

Mirrorform

Cast Mirrorform by paying {4}{U}{U}, causing each nonland permanent you control to become a copy of Omnath.
Put all nonland permanents besides Omnath into your graveyard due to the legend rule.
Each Omnath triggers for each Omnath that died. Resolve all triggers, dealing 3 damage to any target for each trigger.

Near-infinite damage

Omnath, Locus of Rage

Cast Mirrorform by paying {4}{U}{U}, causing each nonland permanent to become a copy of Vela.
Put all but one Vela into your graveyard due to the legend rule.
Each Vela you controlled triggers for each Vela that died, causing each opponent to lose 1 life for each trigger.

Combos with "Mirrorform"