Cloudshift + Eternal Witness + Ajani, Strength of the Pride + Pull from Eternity + Panharmonicon

Cloudshift

Eternal Witness

Ajani, Strength of the Pride

Pull from Eternity

Panharmonicon

How it works

1. 0 Ajani to wipe all your opponent creatures and artifacts.
2. Cast Pull from Eternity targeting Ajani to return it to graveyard.
3. Cast Cloudshift targeting Eternal Witness to return Cloudshift and Ajani to hand.
4. Cloudshift Eternal Witness to return Coudshift and Pull from Eternity to hand.
5. Cast Ajani and use either ability for life/creature.
6. Repeat every turn.