Activate Ashnod's Altar by sacrificing Grave Titan, adding {C}{C}.
When Grave Titan dies, Nim Deathmantle triggers, causing you to pay {4} to return Grave Titan from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Grave Titan enters, it triggers, creating two creature tokens.
Activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
Repeat.

Infinite colorless mana

Infinite creature tokens

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Grave Titan

Declare the creature with Breath of Fury attached and Grave Titan as attackers.
Grave Titan triggers, creating a 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 combat phases

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Infinite creature tokens with haste

Infinite combat damage

Breath of Fury

Anger

Declare Grave Titan and the creature with Breath of Fury attached as attackers.
Grave Titan triggers, creating two 2/2 Zombie 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 Zombie token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase.


Roar of Resistance

Declare The Incredible Hulk and Grave Titan as attackers.
Grave Titan triggers, creating two creature tokens.
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 "Grave Titan"