Activate Goblin Bombardment by sacrificing another creature.
When the creature dies, Bishop of Wings' second ability triggers, creating a 1/1 Spirit creature token.
When the Spirit token enters the battlefield as an Angel due to Arcane Adaptation, Bishop of Wings' first ability triggers, causing you to gain 4 life.
Resolve the Goblin Bombardment ability.
Repeat.
With Arcane Adaptation actively redefining your entire team as Angels, every token that hits your board becomes a catalyst for Bishop of Wings to reward you with a surge of life. When those same tokens inevitably meet their end to fuel Goblin Bombardment's damage-dealing sacrifice ability, the Bishop's death trigger instantly replaces them with fresh 1/1 Spirit tokens. Because Arcane Adaptation ensures those replacements re-enter as Angels, the loop seamlessly restarts, turning a simple sacrifice outlet into an endless cycle of life and destruction.