Nim Deathmantle, Ashnod's Altar, and Triplicate Titan

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Triplicate Titan on the battlefield

Steps

1. Activate Ashnod's Altar sacrificing Triplicate Titan to add
2. Nim Deathmantle and Triplicate Titan trigger
3. Resolve the Triplicate Titan trigger, creating three Golem artifact creature tokens
4. Activate Ashnod's Altar, sacrificing one of the artifact creature tokens to add
5. Resolve the Nim Deathmantle trigger, paying to return Triplicate Titan to the battlefield with Nim Deathmantle attached to it
6. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers