Biovisionary + Increasing Vengeance + Croaking Counterpart

Biovisionary

Increasing Vengeance

Croaking Counterpart

How it works

1. Cast Croaking Counterpart by paying 1, targeting Biovisionary.
2. Holding priority, cast Increasing Vengeance from your graveyard for its flashback cost by paying 3, copying Croaking Counterpart twice, with both copies targeting Biovisionary.
3. Resolve all Croaking Counterparts, creating three token copies of Biovisionary that are 1/1 Frogs.
4. At the beginning of your end step, each Biovisionary triggers.
5. Resolve the first trigger, causing you to win the game.