Breath of Fury attached to another creature you control that can attack this turn.
An opponent cannot block creatures you control.
Ellivere of the Wild Court does not have summoning sickness.
Steps
Declare the creature with Breath of Fury attached and Ellivere of the Wild Court as attackers.
Ellivere of the Wild Court's first ability triggers, creating a 2/2 Cat creature token with haste due to Jinnie Fay.
Deal combat damage using the creature that has Breath of Fury attached.
Breath of Fury and Ellivere of the Wild Court's second ability triggers.
Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the Cat token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Resolve the Ellivere of the Wild Court trigger, causing you to draw a card.