Briar Hydra, and Sage of Hours

Prerequisites

• Briar Hydra on the battlefield
• Sage of Hours on the battlefield

Steps

1. Deal combat damage to an opponent using Briar Hydra
2. Briar Hydra triggers, putting five +1/+1 counters on Sage of Hours
3. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one additional turn after this one
4. Repeat each turn

Results

• Infinite turns