Sigarda's Summons, Bishop of Wings, Master Biomancer, and Goblin Bombardment

Prerequisites

• Sigarda's Summons on the battlefield
• Bishop of Wings on the battlefield
• Master Biomancer on the battlefield
• Goblin Bombardment on the battlefield
• You control an additional Angel

Steps

1. Activate Goblin Bombardment by sacrificing an Angel
2. Bishop of Wings triggers, creating a 1/1 Spirit creature token
3. The Spirit enters the battlefield with at least two +1/+1 counters and becomes a 4/4 Spirit Angel due to having a +1/+1 counter on it
4. Bishop of Wings triggers, causing you to gain four life
5. Resolve Goblin Bombardment's ability, dealing 1 damage to any target
6. Activate Goblin Bombardment by sacrificing the Spirit token
7. Repeat from step 2

Results

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