Biovisionary + Echo Mage + Blue Sun's Twilight

Biovisionary

Echo Mage

Blue Sun's Twilight

How it works

1. Cast Blue Sun's Twilight by paying its mana cost, targeting Biovisionary.
2. Holding priority, activate Echo Mage by tapping it, copying Blue Sun's Twilight twice, with both copies targeting Biovisionary.
3. Resolve all Blue Sun's Twilight 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 clever win hinges on multiplying a single spell to instantly flood the board with your primary win condition. By casting Blue Sun's Twilight to target your original Biovisionary, you set the stage for Echo Mage's fully leveled-up ability to intercept the stack and spit out two exact copies of the spell. Because Blue Sun's Twilight is cast with X high enough to trigger its bonus effect, those copied spells don't just steal the targeted creature—they also create a pair of token copies alongside the original, perfectly satisfying Biovisionary's requirement of controlling four identically named creatures by the time your end step arrives.