Mayael's Aria, and Evra, Halcyon Witness

Prerequisites

• Mayael's Aria on the battlefield
• Evra, Halcyon Witness on the battlefield
• available

Steps

1. At the beginning of your upkeep, Mayael's Aria triggers
2. Holding priority, activate Evra by paying , exchanging its power with your life total
3. 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

Results

• Win the game