Sage of Hours + Bloodspore Thrinax + Thassa, Deep-Dwelling

Sage of Hours

Bloodspore Thrinax

Thassa, Deep-Dwelling

How it works

1. At the beginning of your end step, Thassa triggers, blinking Sage of Hours and causing it to enter the battlefield with five or more +1/+1 counters on it due to Bloodspore Thrinax.
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.