Nim Deathmantle, Krark-Clan Ironworks, and Breya, Etherium Shaper

Prerequisites

• Nim Deathmantle on the battlefield
• Krark-Clan Ironworks on the battlefield
• Breya, Etherium Shaper on the battlefield
• available

Steps

1. Activate Krark-Clan Ironworks by sacrificing Breya, adding
2. When Breya dies, Nim Deathmantle triggers, causing you to pay to return Breya from your graveyard to the battlefield and attach Nim Deathmantle to it
3. When Breya enters, it triggers, creating two artifact creature tokens
4. Activate Krark-Clan Ironworks by sacrificing a creature token, adding
5. Repeat

Results

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