Pitiless Plunderer + Eternal Witness + Mitotic Slime + Nethroi, Apex of Death + Ashnod's Altar

Decks

How it works

Cast Nethroi either from your hand or from the command zone for its mutate cost by paying plus commander tax, if applicable, putting it on top of a non-Human creature you control.
When Nethroi enters the battlefield, it triggers.
Holding priority, activate Ashnod's Altar by sacrificing Nethroi, adding .
When Nethroi dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
Resolve the Nethroi trigger from step 2, returning Eternal Witness and Mitotic Slime from your graveyard to the battlefield.
When Eternal Witness enters the battlefield, it triggers, returning Nethroi from your graveyard to your hand.
Activate Ashnod's Altar twice by sacrificing Eternal Witness and Mitotic Slime, adding .
When Eternal Witness and Mitotic Slime die, Pitiless Plunderer triggers twice and Mitotic Slime triggers once.
Resolve both Pitiless Plunderer triggers, creating two Treasure artifact tokens.
Resolve the Mitotic Slime trigger, creating two 2/2 Ooze creature tokens.
Activate Ashnod's Altar twice by sacrificing two Oozes, adding .
When the Oozes die, they each trigger and Pitiless Plunderer triggers twice.
Resolve both Pitiless Plunderer triggers, creating two Treasure artifact tokens.
Resolve both Ooze triggers, creating four 1/1 Ooze creature tokens.
Activate Ashnod's Altar twice by sacrificing two Oozes, adding .
When the Oozes die, Pitiless Plunderer triggers twice, creating two Treasure artifact tokens.
Activate three Treasures by tapping and sacrificing them, adding .
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.