Nim Deathmantle, Ashnod's Altar, and Ka-Zar of the Savage Land

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Ka-Zar of the Savage Land on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Ka-Zar of the Savage Land, adding
2. When Ka-Zar of the Savage Land dies, Nim Deathmantle triggers, causing you to pay to return Ka-Zar of the Savage Land from your graveyard to the battlefield and attach Nim Deathmantle to it
3. When Ka-Zar of the Savage Land enters, it triggers, creating a creature token
4. Activate Ashnod's Altar by sacrificing a creature token, adding
5. Repeat

Results

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