Myr Battlesphere + Saw in Half + Epic Struggle + Doubling Season

Myr Battlesphere

Saw in Half

Epic Struggle

Doubling Season

How it works

1. On the end step prior to your turn, cast Saw in Half by paying 2, destroying Myr Battlesphere and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
2. The Myr Battlesphere tokens enter the battlefield, creating thirty-two 1/1 Myr artifact creature tokens.
3. At the beginning of your next upkeep, Epic Struggle triggers, causing you to win the game.