Ao, the Dawn Sky, Mortuary, and Stunt Double

Prerequisites

• Ao, the Dawn Sky on the battlefield
• Mortuary on the battlefield
• Stunt Double in hand
• available

Steps

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

Results

• Infinite LTB
• Infinite ETB
• Infinite death triggers