Naru Meha, Master Wizard + Reunion of the House + Phyrexian Altar

How it works

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Cast Reunion of the House by paying .
Holding priority, cast Naru Meha by paying .
When Naru Meha enters the battlefield, it triggers, targeting Reunion of the House.
Holding priority, activate Phyrexian Altar by sacrificing Naru Meha.
Resolve the Naru Meha trigger, copying Reunion of the House, targeting Naru Meha and any other creature(s) as desired.
Resolve the copy of Reunion of the House, returning the targeted creatures from your graveyard to the battlefield.
Repeat from step 3.

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.