Orah, Skyclave Hierophant, Ashnod's Altar, and Nim Deathmantle

Prerequisites

• Orah, Skyclave Hierophant on the battlefield
• Ashnod's Altar on the battlefield
• Nim Deathmantle on the battlefield
• Any Cleric creature card with mana value 3 or less in your graveyard

Steps

1. Activate Ashnod's Altar by sacrificing Orah, adding
2. When Orah dies, it and Nim Deathmantle trigger
3. Resolve Orah's trigger, returning any Cleric card with mana value 3 or less from your graveyard to the battlefield
4. With Nim Deathmantle's trigger still on the stack, activate Ashnod's Altar by sacrificing the returned Cleric, adding
5. Resolve the Nim Deathmantle trigger, paying to return Orah from your graveyard to the battlefield and attach Nim Deathmantle to them
6. Repeat

Results

• Infinite blinking of Clerics with mana value 3 or less
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers