Quilled Greatwurm, and Sage of Hours

Prerequisites

• Quilled Greatwurm on the battlefield
• Sage of Hours on the battlefield
• Sage of Hours has power 5 or greater from any indefinite effect except +1/+1 counters, and does not have summoning sickness
• An opponent cannot block and kill Sage of Hours

Steps

1. Deal combat damage using Sage of Hours
2. Quilled Greatwurm triggers, putting that many +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 extra turn after this one
4. Repeat each turn

Results

• Infinite turns