Vara's Sanctum +
Black-Sky Harbinger = consistent board wipe
Yetipult is also a viable substitute sometimes.
Tome of Horrors is in the deck, not just as an alternate win condition, but in order to help
Essence Feast become another board wipe.
Dark Wisp and
Medibot Station are there to help delay aggro decks as well as help you get to your gas faster.
I only occasionally bring this deck to Throne matches. It served as a good Gauntlet deck for a long time. There's probably some ideas in here that might be useful when Expedition changes again. It was initially based off of a deck from before Expedition was a format, but I don't remember the deck name at all, lol.
Dark Return
x4
1
Permafrost
x1
1
Shadow Etchings
x1
2
Beseech the Throne
x2
2
Dark Wisp
x4
2
Devour
x4
2
Essence Feast
x4
2
Medibot Station
x4
2
Ripknife Assassin
x2
2
Tome of Horrors
x3
2
Vara's Favor
x2
3
Kerendon Merchant
x3
3
Wisdom of the Elders
x2
4
Turn to Seed
x1
4
Yetipult
x4
6
Black-Sky Harbinger
x4
6
Vara's Sanctum
x4
Primal Sigil
x1
Shadow Sigil
x5
Cobalt Waystone
x4
Crest of Cunning
x3
Feln Banner
x4
Feln Insignia
x3
Primal Symbol
x2
Seat of Cunning
x4
View Deck on Shiftstoned