Ao, the Dawn Sky + Mortuary + Mirror Image

Ao, the Dawn Sky

Mortuary

Mirror Image

How it works

1. Cast Mirror Image by paying its mana cost. Choose to have it enter the battlefield as a copy of Ao.
2. Put Mirror Image into your graveyard due to the legend rule.
3. When Mirror Image dies, it and Mortuary trigger.
4. Resolve the Mortuary trigger, putting Mirror Image from your graveyard onto the top of your library.
5. Resolve the Mirror Image trigger, causing you to look at the top seven cards of your library and put Mirror Image onto the battlefield as a copy of Ao.
6. Repeat from step 2.