Molten Echoes, Ashnod's Altar, and Nim Deathmantle

Prerequisites

• Molten Echoes on the battlefield
• Ashnod's Altar on the battlefield
• Nim Deathmantle on the battlefield
• You control a nonlegendary, nontoken creature that has a creature type chosen with Molten Echoes
• available

Steps

1. Activate Ashnod's Altar by sacrificing a nonlegendary, nontoken creature with a creature type named by Molten Echoes, adding
2. Nim Deathmantle triggers, causing you to pay to return the creature from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. The creature enters the battlefield, triggering Molten Echoes, creating a token copy of that creature with haste
4. Activate Ashnod's Altar by sacrificing the token, adding
5. Repeat

Results

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