Sage of Hours + Mimic Vat + Resourceful Defense

Sage of Hours

Mimic Vat

Resourceful Defense

How it works

1. Activate Mimic Vat by paying 3 and tapping it, creating a token copy of a creature with haste that enters with at least five +1/+1 counters on it and creating a delayed triggered ability.
2. At the beginning of your end step, the delayed triggered ability from Mimic Vat triggers, exiling the creature token.
3. When the token leaves the battlefield, Resourceful Defense triggers, 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.