Fungal Shadowsnatcher

Tried this in Ranked but then realized you don't really have to give up too many cards in Expedition so I transitioned it there. This deck is your standard mill scheme, trying to survive while making the enemy discard cards and ultimately deck them with Solitude. In the process your Dreamsnatcher can get pretty big and make for a decent secondary threat.

Mournful Deathcap is the main discard engine. It serves both as a mill card and an enabler for Kindo Shadowstep. Kindo is pretty decent, his defensive stats matter more in a format with less cheap removal and completing his mastery usually means the opponent either dies to Solitude, is close to it, or has to deal with a big Dreamsnatcher. Remember that Kindo almost always dies in the process, though, since his Mastery discard also self-damages.

Felrauk the Outcast is a bit of an experiment. He's expensive and his discard ability doesn't activate until you complete the influence requirements but I think he works decently well with Rainfall Accord. Could see swapping him out for something else though. Rainfall could probably stay since it draws and discard helps Kindo.

Note that Felrauk's Choice has a crazy synergy with Wanted Poster. You kill the cursed unit, draw two cards AND get your Poster back. It also serves as a counterspell, though it can be a bit wonky. For example I stole a Vanquish once while still in Ranked and had to still cast it on my own unit since there were no valid targets on the opponent's side.

The power base and market are in flux as I'm trying to figure them out. Adjudicator's Gavel stops decks reliant of empyting and recurring their Void, Immortalize can bring your huge Dreamsnatcher or nearly-complete Kindo back, the site isn't hugely impactful but can grant some value.

Oh, and watch out for Zhen-Zu, Hand of Nahid and Means to an End.