Enduring Renewal + Ashnod's Altar + Pitiless Plunderer + Liberated Livestock

Exhibition

How it works

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Activate Ashnod's Altar by sacrificing Liberated Livestock, adding .
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 .
When the creature tokens die, Pitiless Plunderer triggers twice, creating two Treasure artifact tokens.
Activate a Treasure by tapping and sacrificing it, adding .
Cast Liberated Livestock by paying .
Repeat.

In which brackets is this combo allowed, per Spellbook's Exhibition tier?

1–2 · Exhibition & Core

Allowed in this bracket.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.