Stangg, Nim Deathmantle, and Ashnod's Altar

Prerequisites

• Stangg on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Stangg, adding
2. When Stangg dies, Nim Deathmantle triggers, causing you to pay to return Stangg from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. When Stangg enters the battlefield, it triggers, creating a 3/4 Stangg Twin creature token
4. Activate Ashnod's Altar by sacrificing the Stangg Twin, adding
5. When the Stangg Twin token dies, Stangg triggers
6. Holding priority, repeat from step 1

Results

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