Perigee Beckoner + Ashnod's Altar + Metamorphosis Fanatic

Decks

How it works

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Cast Perigee Beckoner for its warp cost by paying .
When Perigee Beckoner enters, it triggers, targeting Metamorphosis Fanatic.
Activate Ashnod's Altar by sacrificing Perigee Beckoner.
Activate Ashnod's Altar by sacrificing Metamorphosis Fanatic.
When Metamorphosis Fanatic dies, it triggers, returning itself from your graveyard to the battlefield tapped.
When Metamorphosis Fanatic enters, it triggers, returning Perigee Beckoner from your graveyard to the battlefield.
When Perigee Beckoner enters, it triggers, targeting Metamorphosis Fanatic.
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.