Nim Deathmantle, Ashnod's Altar, and Turtle Blimp

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Turtle Blimp in hand
• available

Steps

1. Cast Turtle Blimp by paying
2. When Turtle Blimp enters, it triggers, creating a 2/2 Mutant creature token
3. Activate Turtle Blimp's crew ability by tapping the Mutant, causing Turtle Blimp to become a creature until end of turn
4. Activate Ashnod's Altar twice by sacrificing the Mutant and Turtle Blimp, adding
5. When Turtle Blimp dies, Nim Deathmantle triggers, causing you to pay to return Turtle Blimp from your graveyard to the battlefield
6. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers