Sovereign Okinec Ahau, Simic Ascendancy, and Colossification

Prerequisites

• Sovereign Okinec Ahau on the battlefield
• Simic Ascendancy on the battlefield
• Colossification on the battlefield
• Sovereign Okinec Ahau does not have summoning sickness

Steps

1. Declare Sovereign Okinec Ahau as an attacker
2. Sovereign Okinec Ahau triggers, putting twenty +1/+1 counters on the creature that has Colossification attached
3. Simic Ascendancy's first ability triggers, putting 20 growth counters on it
4. At the beginning of your next upkeep, Simic Ascendancy's second ability triggers, causing you to win the game

Results

• Win the game at the beginning of your next upkeep