Umbral Collar Zealot, Wormfang Drake, and Angel of Indemnity

Prerequisites

• Umbral Collar Zealot on the battlefield
• Wormfang Drake in hand
• Angel of Indemnity on the battlefield
• available

Steps

1. Cast Wormfang Drake by paying its mana cost
2. When Wormfang Drake enters, its first ability triggers, exiling Angel of Indemnity
3. Activate Umbral Collar Zealot by sacrificing Wormfang Drake
4. When Wormfang Drake dies, its second ability triggers, returning Angel of Indemnity from exile to the battlefield
5. When Angel of Indemnity enters, it triggers, returning Wormfang Drake from your graveyard to the battlefield
6. When Wormfang Drake enters, its first ability triggers, exiling Angel of Indemnity
7. Resolve the Umbral Collar Zealot ability
8. Repeat from step 3

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite surveil