Declare the creature with Breath of Fury attached and Infestation Expert // Infested Werewolf as attackers.
Infestation Expert // Infested Werewolf triggers, creating at least one 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 creature 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 creature ETB

Infinite creature LTB

Infinite combat damage

Infinite combat phases

Infinite creature tokens with haste

Infinite death triggers

Infinite mana creatures you control can produce

Infinite creature sacrifice triggers

Infinite untap of creatures you control

Breath of Fury

Mass Hysteria

Infestation Expert // Infested Werewolf

Activate Ashnod's Altar by sacrificing Infestation Expert // Infested Werewolf, adding {C}{C}.
When Infestation Expert // Infested Werewolf dies, Nim Deathmantle triggers, causing you to pay {4} to return Infestation Expert // Infested Werewolf from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Infestation Expert // Infested Werewolf enters, it triggers, creating at least one creature token.
Activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
Repeat.

Infinite colorless mana

Infinite creature tokens

Nim Deathmantle

Ashnod's Altar

Activate Eldrazi Displacer by paying {2}{C}, blinking Infested Werewolf.
When Infested Werewolf enters, it triggers, creating two creature tokens.
Activate Ashnod's Altar by sacrificing two creature tokens, adding {C}{C}{C}{C}.
Repeat.

Infinite blinking of most creatures

Infinite blinking

Eldrazi Displacer

Activate Emiel by paying {3}, blinking Infested Werewolf.
Infested Werewolf enters the battlefield, creating two 1/1 Insect creature tokens.
Activate Ashnod's Altar by sacrificing both Insect tokens, adding {C}{C}{C}{C}.
Repeat.

Emiel the Blessed

Declare The Incredible Hulk and Infestation Expert // Infested Werewolf as attackers.
Infestation Expert // Infested Werewolf triggers, creating at least one creature token.
Holding priority, activate Goblin Bombardment by sacrificing a creature token, dealing 1 damage to The Incredible Hulk.
The Incredible Hulk triggers, putting a +1/+1 counter on it, then untapping it and causing you to get an additional combat phase after this one.
Repeat each combat phase.

Infinite damage

Bruce Banner // The Incredible Hulk

Goblin Bombardment

Combos with "Infestation Expert // Infested Werewolf"