Breath of Fury attached to a creature you control.
An opponent cannot block creatures you control.
Steps
Deal combat damage to an opponent using the creature that has
Breath of Fury attached, triggering
Breath of Fury and
Disa the Restless's second ability.
Resolve the
Disa the Restless trigger, creating a Tarmogoyf creature token.
Resolve the
Breath of Fury trigger, causing you to sacrifice the creature it is attached to and attach it to the Tarmogoyf token, then causing untap all creatures you control and to get an additional combat phase after this one.