Activate Krenko by tapping it, creating a number of 1/1 Goblin creature tokens equal to the number of Goblins you control.
Activate Skirk Prospector by sacrificing Krenko, adding {R}.
Choose to return Krenko to the command zone from your graveyard.
Activate Skirk Prospector by sacrificing a Goblin, adding {R}.
Repeat step 4 until you have enough mana to cast Krenko.
Cast Krenko from the command zone by paying {2}{R}{R} plus commander tax.
Repeat.

Infinite commander casts

Infinite creature tokens with haste

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite red mana

Infinite creature sacrifice triggers

Infinite storm count

Krenko, Mob Boss

Skirk Prospector

Goblin Chieftain

Activate Krenko by tapping it, creating a number of 1/1 Goblin creature tokens equal to the number of Goblins you control.
Activate Phyrexian Altar by sacrificing Krenko, adding {R}.
Choose to return Krenko to the command zone from your graveyard.
Activate Phyrexian Altar by sacrificing a Goblin, adding {R}.
Repeat step 4 until you have enough mana to cast Krenko.
Cast Krenko from the command zone by paying {2}{R}{R} plus commander tax.
Repeat.

Infinite colored mana

Phyrexian Altar

Activate Krenko by tapping it, creating a number of 1/1 Goblin creature tokens equal to the number of Goblins you control.
Activate Thermopod's second ability by sacrificing Krenko, adding {R}.
Choose to return Krenko to the command zone from your graveyard.
Activate Thermopod's second ability by sacrificing a Goblin, adding {R}.
Repeat step 4 until you have enough mana to cast Krenko.
Cast Krenko from the command zone by paying {2}{R}{R} plus commander tax.
Repeat.

Thermopod

Declare the creature with Breath of Fury attached, and at least one Goblin if the creature with Breath of Fury attached isn't an Assassin, as attackers.
General Kreat's first ability triggers, creating a 1/1 Goblin creature token that's tapped and attacking.
When the Goblin enters the battlefield, General Kreat's second ability triggers, dealing 1 damage to each opponent.
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 Goblin 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 untap of creatures you control

Infinite mana creatures you control can produce

Infinite combat damage

Infinite damage

General Kreat, the Boltbringer

Breath of Fury

Declare Battle Cry Goblin, the creature with Breath of Fury attached, and any number of other creatures as attackers.
Battle Cry Goblin triggers, creating a 1/1 Goblin creature token that is tapped and attacking.
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 Goblin token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase.


Battle Cry Goblin

Declare Squee and the creature with Breath of Fury attached as attackers.
Squee triggers, creating a 1/1 Goblin creature token that is tapped and attacking.
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 Goblin token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase.

Combos with "Goblin Chieftain"