Ao, the Dawn Sky, Mortuary, and Flesh Duplicate

Prerequisites

• Ao, the Dawn Sky on the battlefield
• Mortuary on the battlefield
• Flesh Duplicate in hand
• available

Steps

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

Results

• Infinite LTB
• Infinite ETB
• Infinite death triggers