Breath of Fury attached to any other creature you control.
You control at least one additional creature.
An opponent cannot block creatures you control.
Steps
Deal combat damage using the creature that has
Breath of Fury attached.
Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach
Breath of Fury to any other creature you control, then causing you to untap all creatures you control and to get an additional combat phase after this one.
When the creature that had
Breath of Fury attached dies as an Angel due to
Maskwood Nexus,
Bishop of Wings' second ability triggers, creating a 1/1 Spirit creature token.
When the Spirit enters the battlefield as an Angel due to
Maskwood Nexus,
Bishop of Wings' first ability triggers, causing you to gain 4 life.