Calamity, Galloping Inferno + Biovisionary + Exalted Sunborn

Calamity, Galloping Inferno

Biovisionary

Exalted Sunborn

How it works

1. Activate Calamity's saddle ability by tapping Biovisionary, causing Calamity to become saddled until end of turn.
2. Declare Calamity as an attacker.
3. Calamity triggers, creating four token copies of Biovisionary that are tapped and attacking.
4. At the beginning of your end step, Calamity triggers four times and each Biovisionary triggers.
5. Resolve the first Biovisionary trigger, causing you to win the game.