Declare the creature with Breath of Fury attached and The Golden-Gear Colossus as attackers.
The Golden-Gear Colossus triggers, creating two creature tokens.
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 a 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 ETB

Infinite LTB

Infinite combat damage

Infinite combat phases

Infinite creature tokens with haste

Infinite death triggers

Infinite mana creatures you control can produce

Infinite sacrifice triggers

Infinite untap of creatures you control

Breath of Fury

Alibou, Ancient Witness

Tetzin, Gnome Champion // The Golden-Gear Colossus

Anger

Activate Liquimetal Torque by tapping it, causing Ultimecia, Time Sorceress to become an artifact.
Declare The Golden-Gear Colossus as an attacker. It triggers, creating two 1/1 Gnome artifact creature tokens and transforming Ultimecia, Time Sorceress into Ultimecia, Omnipotent.
Ultimecia, Omnipotent triggers, causing you to take an extra turn after this one.
At the beginning of your end step, Airbender Ascension triggers, blinking Ultimecia, Omnipotent. It'll enter the battlefield as Ultimecia, Time Sorceress.
When Ultimecia, Time Sorceress enters, it triggers, causing you to surveil 2.
Repeat each turn.

Infinite turns

Lock

Ultimecia, Time Sorceress // Ultimecia, Omnipotent

Airbender Ascension

Liquimetal Torque

Declare The Incredible Hulk and The Golden-Gear Colossus as attackers.
The Golden-Gear Colossus triggers, creating two creature tokens.
When the tokens enter, Blasting Station triggers twice, untapping Blasting Station.
Holding priority, activate Blasting Station by tapping it and 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 creature tokens

Infinite damage

Bruce Banner // The Incredible Hulk

Blasting Station

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