Brago, King Eternal, Sage of Hours, and Cathars' Crusade

Prerequisites

• Brago, King Eternal on the battlefield
• Sage of Hours on the battlefield
• Cathars' Crusade on the battlefield
• Brago does not have summoning sickness
• Brago cannot be blocked and killed by an opponent
• You control at least five creatures

Steps

1. Deal combat damage with Brago
2. Brago triggers, blinking at least five creatures
3. Cathars' Crusade triggers for each creature that enters the battlefield
4. Resolve the first Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control
5. Repeat step 4 for each remaining trigger
6. Activate Sage of Hours' ability by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one
7. Repeat

Results

• Infinite turns