Breath of Fury attached to another creature that can attack this turn.
An opponent cannot block creatures you control.
Glint-Eye Nephilim does not have summoning sickness.
Steps
Deal combat damage to an opponent using Gint-Eye Nephilim and the creature with Breath of Fury attached.
Breath of Fury and Glint-Eye Nephilim trigger.
Resolve the Glint-Eye Nephilim trigger, causing you to draw two cards.
The Locust God triggers twice, creating two 1/1 Insect creature tokens with flying and haste.
Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to an Insect token, untap all creatures you control and get an additional combat phase after this one.