Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Skirk Prospector by sacrificing the Goblin token, adding {R}.
Repeat.

Infinite colorless mana

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Ardoz, Cobbler of War

Mana Echoes

Skirk Prospector

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Phyrexian Altar by sacrificing the Goblin token, adding {R}.
Repeat.

Phyrexian Altar

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Thermopod's second ability by sacrificing the Goblin token, adding {R}.
Repeat.

Thermopod

Activate Ardoz by paying {4}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Repeat.

Infinite colored mana

Infinite creature tokens with haste

Mycosynth Lattice

Chromatic Orrery

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Energy Refractor by paying {2}, adding {R}.
Repeat.

Energy Refractor

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Gemstone Array's first ability by paying {2}, putting a charge counter on it.
Activate Gemstone Array's second ability by removing a charge counter from it, adding {R}.
Repeat.

Infinite charge counters on a permanent

Gemstone Array

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Prismite by paying {2}, adding {R}.
Repeat.

Prismite

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Stonework Packbeast by paying {2}, adding {R}.
Repeat.

Stonework Packbeast

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Crossroads Candleguide by paying {2}, adding {R}.
Repeat.

Crossroads Candleguide

Activate Ardoz by paying {3}{R}, creating a 1/1 Goblin creature token with haste.
The Goblin enters the battlefield, triggering Ardoz and Mana Echoes.
Resolve the Ardoz trigger, giving the Goblin +2/+0 until end of turn.
Resolve the Mana Echoes trigger, adding {C} for each Goblin you control.
Activate Signpost Scarecrow by paying {2}, adding {R}.
Repeat.

Combos with "Ardoz, Cobbler of War"