You See a Pair of Goblins in exile (exiled by Spellbinder).
All permanents on the battlefield.
Breath of Fury and Spellbinder attached to different creatures you control.
An opponent cannot block creatures you control.
Steps
Deal combat damage to an opponent using the creatures that have Spellbinder and Breath of Fury attached.
Spellbinder and Breath of Fury trigger.
Resolve the Spellbinder trigger, casting a copy of You See a Pair of Goblins without paying its mana cost.
Resolve the copy of You See a Pair of Goblins, creating two 1/1 Goblin creature tokens.
Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, attach Breath of Fury to a Goblin token, untap all creatures you control and get an additional combat phase after this one.