Nim Deathmantle, Krark-Clan Ironworks, and Triplicate Titan

Prerequisites

• Nim Deathmantle on the battlefield
• Krark-Clan Ironworks on the battlefield
• Triplicate Titan on the battlefield

Steps

1. Activate Krark-Clan Ironworks by sacrificing Triplicate Titan, adding
2. Triplicate Titan dies, triggering itself and Nim Deathmantle
3. Resolve the Triplicate Titan trigger, creating three 3/3 Golem artifact creature tokens
4. Activate Krark-Clan Ironworks by sacrificing a Golem, adding
5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Triplicate Titan from your graveyard to the battlefield, and attach Nim Deathmantle to it
6. Repeat

Results

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