Zabaz, the Glimmerwasp, Cauldron of Souls, Dross Scorpion, and Ashnod's Altar

Prerequisites

• Zabaz, the Glimmerwasp on the battlefield
• Cauldron of Souls on the battlefield
• Dross Scorpion on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Cauldron of Souls by tapping it, giving Zabaz persist until end of turn
2. Activate Ashnod's Altar by sacrificing Zabaz, adding
3. Zabaz dies, triggering its persist ability and Dross Scorpion
4. Resolve the Zabaz trigger, returning it to the battlefield with zero +1/+1 counters due to its modular ability
5. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls
6. Repeat

Results

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