Ao, the Dawn Sky + Mortuary + Clever Impersonator

Ao, the Dawn Sky

Mortuary

Clever Impersonator

How it works

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