All permanents on the battlefield (Breath of Fury attached to any creature you control except Adeline).
An opponent cannot block creatures you control.
The creature with Breath of Fury attached does not have summoning sickness.
Steps
Declare the creature with Breath of Fury attached as an attacker.
Adeline triggers, creating a 2/2 creature token with haste tapped and attacking each opponent.
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 a Cat token, then causing you to untap all creatures you control and to get an additional combat phase after this one.