Glider Staff + Krark-Clan Ironworks + Auriok Survivors

How it works

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Cast Glider Staff by paying .
When Glider Staff enters, it triggers, airbending Auriok Survivors
Activate Krark-Clan Ironworks by sacrificing Glider Staff, adding .
Cast Auriok Survivors from exile by paying .
When Auriok Survivors enters, it triggers, returning Glider Staff from your graveyard to the battlefield.
Repeat from step 2.

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.