Sage of Hours + Ezuri, Claw of Progress

Prerequisites

You have at least 5 experience counters.

Steps

1. At the beginning of your combat phase, Ezuri triggers, putting at least five +1/+1 counters on Sage of Hours.
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 each turn.