Declare the creatures with Staff of Titania and Breath of Fury attached as attackers.
Staff of Titania triggers, creating a 1/1 Forest Dryad land creature token.
Deal combat damage using the creature that has Breath of Fury attached.
Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the Forest Dryad token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase.

Infinite combat damage

Infinite combat phases

Infinite death triggers

Infinite ETB

Infinite landfall triggers

Infinite LTB

Infinite mana creatures you control can produce

Infinite sacrifice triggers

Infinite untap of creatures you control

Breath of Fury

Staff of Titania

Anger

Fervor

Mass Hysteria

Urabrask the Hidden

Roar of Resistance

Activate Xavier Sal by tapping it and removing a counter from a permanent you control, creating a token copy of the Forest Dryad token.
When the Forest Dryad enters the battlefield, Intruder Alarm and Bristly Bill trigger.
Resolve the Bristly Bill trigger, putting a counter on it.
Resolve the Intruder Alarm trigger, untapping all creatures.
Repeat.

Combos with "Staff of Titania"