Simic Ascendancy, Master Biomancer, and Colossification

Prerequisites

• Simic Ascendancy on the battlefield
• Master Biomancer on the battlefield
• Colossification on the battlefield
• You have a way to cause another creature to enter the battlefield under your control

Steps

1. Cause another creature to enter the battlefield under your control with at least 22 +1/+1 counters on it due to Master Biomancer
2. Simic Ascendancy's second ability triggers, putting 22 growth counters on Simic Ascendancy
3. At the beginning of your next upkeep, Simic Ascendancy's third ability triggers, causing you to win the game

Results

• Win the game at the beginning of your next upkeep