Rattleblaze Scarecrow, Luminous Broodmoth, and Krark-Clan Ironworks

Prerequisites

• Rattleblaze Scarecrow on the battlefield
• Luminous Broodmoth on the battlefield
• Krark-Clan Ironworks on the battlefield

Steps

1. Activate Krark-Clan Ironworks by sacrificing Rattleblaze Scarecrow, adding
2. When Rattleblaze Scarecrow dies, its persist ability triggers if it didn't have a -1/-1 counter, and Luminous Broodmoth triggers if Rattleblaze Scarecrow didn't have flying
3. Resolve the persist trigger, if applicable, returning Rattleblaze Scarecrow from your graveyard to the battlefield with either a -1/-1 counter on it
4. Resolve the Luminous Broodmoth trigger, if applicable, returning Rattleblaze Scarecrow from your graveyard to the battlefield with a flying counter on it if Rattleblaze Scarecrow is still in your graveyard
5. Repeat

Results

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