Sigarda's Summons, Bishop of Wings, Cathars' Crusade, and Blasting Station

Prerequisites

• Sigarda's Summons on the battlefield
• Bishop of Wings on the battlefield
• Cathars' Crusade on the battlefield
• Blasting Station on the battlefield
• You control an additional Angel

Steps

1. Activate Blasting Station by sacrificing an Angel
2. Bishop of Wings triggers, creating a 1/1 Spirit creature token
3. The Spirit enters the battlefield, triggering Cathars' Crusade and Blasting Station
4. Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control
5. The Spirit token becomes a 4/4 Spirit Angel due to having a +1/+1 counter on it
6. Resolve the Blasting Station trigger from step 3, untapping itself
7. Resolve Blasting Station's remaining ability, dealing 1 damage to any target
8. Activate Blasting Station by tapping it and sacrificing the Spirit token
9. Repeat from step 2

Results

• Infinite +1/+1 counters
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers