Yannik, Scavenging Sentinel, Sage of Hours, and Conjurer's Closet

Prerequisites

• Yannik, Scavenging Sentinel on the battlefield
• Sage of Hours on the battlefield
• Conjurer's Closet on the battlefield
• You control a nontoken creature with power five or greater, or you own a creature with power five or greater that is exiled by Yannik

Steps

1. At the beginning of your end step, Conjurer's Closet triggers, blinking Yannik
2. Yannik leaves the battlefield, causing any permanents exiled by it to re-enter the battlefield under their owner's control
3. Yannik enters the battlefield, exiling a nontoken creature you control with power five or greater until Yannik leaves the battlefield, and putting at least five +1/+1 counters on Sage of Hours
4. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one
5. Repeat each turn

Results

• Infinite turns