Ouroboroid, and Sage of Hours

Prerequisites

• Ouroboroid on the battlefield
• Sage of Hours on the battlefield

Steps

1. At the beginning of your combat phase, Ouroboroid triggers, putting at least five +1/+1 counters on each creature you control
2. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one
3. Repeat

Results

• Infinite turns