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

Prerequisites

• Breya, Etherium Shaper on the battlefield
• Nim Deathmantle on the battlefield
• Krark-Clan Ironworks on the battlefield
• You control at least two additional artifact creatures

Steps

1. Activate Krark-Clan Ironworks by sacrificing two additional artifact creatures, adding
2. Activate Krark-Clan Ironworks by sacrificinng Breya, adding
3. Nim Deathmantle triggers, causing you to pay to return Breya from your graveyard to the battlefield, and attach Nim Deathmantle to it
4. Breya enters the battlefield, creating two 1/1 Thopter tokens
5. Repeat
6. Once you have infinite colorless mana, you may use it to activate Breya's other abilities

Results

• Infinite colorless mana
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers