Mayael's Aria, Jumbo Cactuar, and Sphinx of the Second Sun

Prerequisites

• Mayael's Aria on the battlefield
• Jumbo Cactuar on the battlefield
• Sphinx of the Second Sun on the battlefield

Steps

1. Declare Jumbo Cactuar as an attacker, triggering its ability, giving it +9999/+0 until end of turn
2. At the beginning of your postcombat main phase, Sphinx of the Second Sun triggers, causing you to get an additional beginning phase after this phase
3. During the beginning phase's upkeep step, Mayael's Aria triggers, causing you to put a +1/+1 counter on each creature you control, gain 10 life, and win the game

Results

• Win the game