Breath of Fury attached to another creature you control that does not have summoning sickness.
You control at least one additional creature that does not have summoning sickness.
An opponent cannot block and kill creatures you control.
Steps
At the beginning of your combat phase, Glissa triggers, creating two Incubator artifact tokens with two +1/+1 counters on them.
Deal combat damage to an opponent using the creature with Breath of Fury attached.
Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to another creature you control, then causing you to untap all creatures you control and to get an additional combat phase after this one.
At the beginning of your next combat phase, Glissa triggers, transforming all Incubators you control into 0/0 Phyrexian artifact creatures.