Sage of Hours + Master Biomancer + Kiki-Jiki, Mirror Breaker

Sage of Hours

Master Biomancer

Kiki-Jiki, Mirror Breaker

How it works

1. Activate Kiki-Jiki by tapping it, creating a token copy of Sage of Hours that enters the battlefield with at least five +1/+1 counters due to Master Biomancer.
2. Activate the Sage of Hours token by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
3. Repeat each turn.