Ao, the Dawn Sky + Mortuary + Undercover Operative

Ao, the Dawn Sky

Mortuary

Undercover Operative

How it works

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