Mayael's Aria, and Colossus of Akros

Prerequisites

• Mayael's Aria on the battlefield
• Colossus of Akros on the battlefield
• Colossus of Akros is not monstrous
• available

Steps

1. At the beginning of your upkeep, Mayael's Aria triggers
2. Holding priority, activate Colossus of Akros by paying , putting ten +1/+1 counters on it and causing it to become monstrous
3. Resolve the Mayael's Aria trigger, causing you to put a +1/+1 counter on each creature you control, gain ten life, and win the game

Results

• Win the game at the beginning of your next upkeep