Activate Ashnod's Altar by sacrificing Liberated Livestock, adding {C}{C}.
When Liberated Livestock dies, it and Nim Deathmantle triggers.
Resolve the Liberated Livestock trigger, creating a 1/1 Cat, a 1/1 Bird, and a 2/4 Ox creature token.
Activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Liberated Livestock from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Repeat.

Infinite colorless mana

Infinite creature tokens

Infinite creature ETB

Infinite creature LTB

Infinite death triggers

Infinite creature sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Liberated Livestock

Activate Phyrexian Altar by sacrificing Liberated Livestock, adding {W}.
When Liberated Livestock dies, it and Enduring Renewal trigger.
Resolve the Liberated Livestock trigger, creating a 1/1 Cat, a 1/1 Bird, and a 2/4 Ox creature token.
Resolve the Enduring Renewal trigger, returning Liberated Livestock to your hand from your graveyard.
Activate Ashnod's Altar three times by sacrificing the Bird, Cat and Ox, adding six {C}.
Cast Liberated Livestock by paying {5}{W}.
Repeat.
Once you have infinite colorless mana, you may forego sacrificing tokens to Ashnod's Altar.

Infinite colored mana

Infinite storm count

Enduring Renewal

Phyrexian Altar

Activate Earthcraft by tapping Liberated Livestock, untapping a basic Plains you control.
Activate the Plains by tapping it, adding {W}.
Activate Ashnod's Altar by sacrificing Liberated Livestock, adding {C}{C}.
When Liberated Livestock dies, it and Enduring Renewal trigger.
Resolve the Liberated Livestock trigger, creating a 1/1 Cat, a 1/1 Bird, and a 2/4 Ox creature token.
Resolve the Enduring Renewal trigger, returning Liberated Livestock to your hand from your graveyard.
Activate Ashnod's Altar twice by sacrificing two of the creature tokens, adding {C}{C}{C}{C}.
Cast Liberated Livestock by paying {5}{W}.
Repeat.

Infinite mana basic lands you control can produce

Infinite untap of basic lands you control

Earthcraft

Activate Ashnod's Altar by sacrificing Liberated Livestock, adding {C}{C}.
When Liberated Livestock dies, it, Pitiless Plunderer and Enduring Renewal trigger.
Resolve the Liberated Livestock trigger, creating a 1/1 Cat, a 1/1 Bird, and a 2/4 Ox creature token.
Resolve the Pitiless Plunderer trigger, creating a Treasure artifact token.
Resolve the Enduring Renewal trigger, returning Liberated Livestock to your hand from your graveyard.
Activate Ashnod's Altar twice by sacrificing two of the creature tokens, adding {C}{C}{C}{C}.
When the creature tokens die, Pitiless Plunderer triggers twice, creating two Treasure artifact tokens.
Activate a Treasure by tapping and sacrificing it, adding {W}.
Cast Liberated Livestock by paying {5}{W}.
Repeat.

Combos with "Liberated Livestock"