Nim Deathmantle, Ashnod's Altar, and Elgaud Inquisitor

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Elgaud Inquisitor on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Elgaud Inquisitor, adding
2. When Elgaud Inquisitor dies, it and Nim Deathmantle triggers
3. Resolve the Elgaud Inquisitor trigger, creating a 1/1 Spirit creature token
4. Activate Ashnod's Altar by sacrificing the Spirit, adding
5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Elgaud Inquisitor from your graveyard to the battlefield, and attach Nim Deathmantle to it
6. Repeat

Results

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