Biovisionary + Echo Mage + Heat Shimmer

Biovisionary

Echo Mage

Heat Shimmer

How it works

1. Cast Heat Shimmer by paying its mana cost, targeting Biovisionary.
2. Holding priority, activate Echo Mage by tapping it, copying Heat Shimmer twice, with both copies targeting Biovisionary.
3. Resolve all Heat Shimmer spells, creating three token copies of Biovisionary.
4. At the beginning of your end step, each Biovisionary triggers. Resolve the first trigger, causing you to win the game.

This ingenious win condition relies on multiplying a single spell to hit an alternate victory threshold in a single turn. By casting Heat Shimmer on your original Biovisionary, you set up the raw material for your win, but it's a fully leveled Echo Mage that transforms the single-target spell into a trio of token copies. Because these token copies enter the battlefield alongside your original creature, your end step triggers all four Biovisionary abilities simultaneously, satisfying the four-creature requirement and immediately securing total victory.