Olivia, Mobilized for War + Ashnod's Altar + Doom Weaver + Persist Creature

Decks

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How it works

Activate Ashnod's Altar by sacrificing the persist creature.
When the persist creature dies, its persist ability and the ability granted to it by Doom Weaver each trigger.
Resolve the second trigger, causing you to draw a card.
Resolve the persist trigger, returning the persist creature from your graveyard to the battlefield with a -1/-1 counter on it.
When the persist creature enters the battlefield, Olivia and Doom Weaver's soulbond ability trigger.
Resolve the Olivia trigger, putting a +1/+1 counter on the persist creature and causing you to discard a card.
Resolve the Doom Weaver trigger, repairing it and the persist creature.
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.