Summon: G.F. Cerberus + Biovisionary + Mirage Mockery

Summon: G.F. Cerberus

Biovisionary

Mirage Mockery

How it works

1. At the beginning of your precombat main phase. Summon: G.F. Cerberus triggers, putting a lore counter on it and triggering its third chapter ability, copying the next instant or sorcery spell you cast twice.
2. Cast Mirage Mockery by paying its mana cost, targeting Biovisionary.
3. Summon: G.F. Cerberus triggers, copying Mirage Mockery twice, with the copies targeting Biovisionary.
4. Resolve all Mirage Mockerys, copying Biovisionary three times.
5. At the beginning of your end step, each Biovisionary triggers. Resolve the first trigger, causing you to win the game.

By leveraging the late-game power of Summon: G.F. Cerberus, you can turn a single spell into a game-winning flurry. When you cast Mirage Mockery with the Saga's third chapter active, its ability multiplies the spell into three total instances. This lets you target your original Biovisionary to create three exact token copies, giving you the exact quartet needed to instantly satisfy Biovisionary's alternate win condition as your end step arrives.