Whenever an Angel enters the battlefield under your control, you gain 4 life.
Whenever an Angel you control dies, create a 1/1 white Spirit creature token with flying.
If Bishop of Wings dies at the same time as one or more Angels you control, its last ability triggers for each of those Angels.
If an effect (such as that of Arcane Adaptation) causes Bishop of Wings to be an Angel, its first ability triggers as it enters the battlefield and its last ability triggers as it dies.