One card combo with Spellseeker if the commander is online. The standard line costs , 2 cards in graveyard.

1. Cast Spellseeker for . Find Culling the Weak. With  more available, Sacrifice (not mainboard) also works.
2. Cast Culling for  in pool, sacrificing Spellseeker. Activate Araumi of the Dead Tide's ability targeting Spellseeker, using  from the Culling mana and , getting three copies.
3. Off the Spellseeker tokens, find Entomb, Unearth, and Demonic Consultation. Mana permitting, each of these have redundant cards, as Unmarked Grave, Reanimate, and Tainted Pact, respectively.
4. Entomb Thassa's Oracle, reanimate it, then cast Consultation to exile your library. Win with Oracle's ETB.

If Spellseeker is in your graveyard, the line costs  ( more if Entomb was used to put Seeker there), 3 extra cards in graveyard. Just do the same steps as above, post-Culling.

Intuition piles (Araumi active):

Thassa's Oracle, Snapcaster Mage, Demonic Consultation/Tainted Pact (requires ).
Thassa's Oracle, Spellseeker, flex (requires ).
Buried Alive pile: Spellseeker, Oracle, flex. It's usually good to find the third creature just so you have more graveyard fodder to exile to Araumi.

Backups: Ad Nauseam or Peer into the Abyss, Hullbreacher/Notion Thief + wheel, or classic Oracle + Consult.