Mayael's Aria + Devilish Valet + March of the Multitudes

Mayael's Aria

Devilish Valet

March of the Multitudes

How it works

1. At the beginning of your upkeep, Mayael's Aria triggers.
2. Holding priority, cast March of the Multitudes with X=5 by tapping Devilish Valet and by paying at most 4, creating five 1/1 Soldier creature tokens.
3. When the Soldiers enter the battlefield, Devilish Valet triggers five times, doubling its power five 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 clever setup harnesses the exponential growth of Devilish Valet to instantly satisfy the win condition of Mayael's Aria. By responding to Mayael's Aria's upkeep trigger with a well-timed March of the Multitudes, you flood the board with tokens—using Devilish Valet's own body to help pay its convoke cost—which triggers the Valet's alliance ability repeatedly to skyrocket its power far past the required threshold. When the original enchantment trigger finally resolves, you've effortlessly cleared all three clauses of Mayael's Aria, gaining life, boosting your board, and claiming immediate victory.