Muldrotha, the Gravetide + Lion's Eye Diamond + Last Voyage of the _____ + Phantasmal Image

Powerful

Decks

How it works

—

Cast Lion's Eye Diamond from your graveyard by paying .
Activate Lion's Eye Diamond by sacrificing it and discarding your hand, adding .
Cast Phantasmal Image from your graveyard by paying .
Phantasmal Image enters the battlefield as a copy of Muldrotha.
The original Muldrotha dies due to the legend rule.
Cast Lion's Eye Diamond from your graveyard by paying .
Activate Lion's Eye Diamond by sacrificing it and discarding your hand, adding .
Cast Last Voyage of the _____ from your graveyard by paying .
Last Voyage of the _____'s first ability triggers, returning Muldrotha from your graveyard to the battlefield.
Phantasmal Image dies due to the legend rule.
Repeat.

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

1–2 · Exhibition & Core

Spellbook classifies this as Powerful — not for these brackets.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.