Biovisionary + Storm King's Thunder + Double Major

Biovisionary

Storm King's Thunder

Double Major

How it works

1. Cast Storm King's Thunder by paying 2, copying the next instant or sorcery spell you cast twice.
2. Cast Biovisionary by paying 1.
3. Holding priority, cast Double Major by paying , targeting Biovisionary.
4. Storm King's Thunder triggers, copying Double Major twice, with both copies targeting Biovisionary.
5. Resolve all Double Majors, creating three copies of the Biovisionary spells.
6. Resolve all Biovisionary spells, causing you to have a nontoken Biovisionary and three token Biovisionaries.
7. At the beginning of your end step, each Biovisionary triggers.
8. Resolve the first trigger, causing you to win the game.