Nim Deathmantle, Ashnod's Altar, and Orzhov Enforcer

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Orzhov Enforcer on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Orzhov Enforcer, adding
2. When Orzhov Enforcer dies, it and Nim Deathmantle trigger, Resolve the Orzhov Enforcer trigger, creating a creature token
3. Holding priority, activate Ashnod's Altar by sacrificing a creature token, adding
4. Resolve the Nim Deathmantle trigger, causing you to pay to return Orzhov Enforcer from your graveyard to the battlefield and attach Nim Deathmantle to it
5. Repeat

Results

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