Bishop of Wings, Umbral Collar Zealot, and Maskwood Nexus

Prerequisites

• Bishop of Wings on the battlefield
• Umbral Collar Zealot on the battlefield
• Maskwood Nexus on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing another creature
2. When the creature dies, Bishop of Wings' second ability triggers, creating a 1/1 Spirit creature token
3. When the Spirit token enters the battlefield as an Angel due to Maskwood Nexus, Bishop of Wings' first ability triggers, causing you to gain 4 life
4. Resolve the Umbral Collar Zealot ability
5. Repeat

Results

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