Scarecrone, Su-Chi Cave Guard, Voltaic Construct, and Krark-Clan Ironworks

Prerequisites

• Scarecrone on the battlefield
• Su-Chi Cave Guard on the battlefield
• Voltaic Construct on the battlefield
• Krark-Clan Ironworks on the battlefield
• Scarecrone does not have summoning sickness

Steps

1. Activate Krark-Clan Ironworks by sacrificing Su-Chi Cave Guard, adding
2. When Su-Chi Cave Guard dies, it triggers, adding eight
3. Activate Scarecrone's second ability by paying and tapping it, returning Su-Chi Cave Guard to the battlefield from your graveyard
4. Activate Voltaic Construct by paying , untapping Scarecrone
5. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite untap of artifact creatures you control