Time Sieve, Biotransference, Helm of the Host, and Master of Waves

Prerequisites

• Time Sieve on the battlefield
• Biotransference on the battlefield
• Helm of the Host on the battlefield
• Master of Waves on the battlefield
• Helm of the Host attached to Master of Waves
• Your devotion to blue is at least four

Steps

1. At the beginning of your combat phase, Helm of the Host triggers, creating a token copy of Master of Waves with haste
2. The Master of Waves token triggers, creating a number of 1/0 Elemental creature tokens equal to your devotion to blue
3. Activate Time Sieve by tapping it and sacrificing five creature tokens, causing you to take an extra turn after this one
4. Repeat each turn

Results

• Infinite turns