Mayael's Aria + Devilish Valet + Secure the Wastes

Mayael's Aria

Devilish Valet

Secure the Wastes

How it works

1. At the beginning of your upkeep, Mayael's Aria triggers.
2. Holding priority, cast Secure the Wastes by paying 5, creating five 1/1 Warrior creature tokens.
3. When the Warriors enter the battlefield, Devilish Valet triggers that many times, doubling its power that many times, causing its power to be at least 32 until end of turn.
4. Resolve the Mayael's Aria trigger, causing you to put a +1/+1 counter on each creature you control, gain 10 life and win the game.

This explosive sequence hinges on the exponential growth of Devilish Valet, whose alliance ability doubles its power every time another creature enters the battlefield. By dropping a heavily-funded Secure the Wastes during your upkeep, you flood the board with tokens that trigger the Valet repeatedly in quick succession, skyrocketing its power well past the crucial threshold of 20. This leaves the board perfectly primed for Mayael's Aria, whose upkeep trigger resolves to see the massive power spike and immediately awards you the win the game.