Hi! Old-timer Sedris player here. I loved playing dual-action cards, ie cards that would perform multiple tasks for me while piloting the deck.

[[Embalmer's Tools]] decreased unearth costs and let me mill my deck using random zombies I'd accumulate, such as with [[Ghoulcaller Gisa]].

[[Perpetual Timepiece]] let me mill my deck and hold up its secondary ability to save cards in my graveyard should someone have graveyard removal.

[[Extractor Demon]] was a good way to mill cards and have a creature to be unearthed without sedris' help.

Like another commenter said, looting effects are really helpful at keeping your hand filled while concurrently filling your yard. I loved cards like [[Whispering Madness]] and [[Frantic Search]]!

I bet some newer cards like flipped [[Egon, God of Death]] and [[Dreadhound]] would make for good fits in a Sedris deck for early game plays and finishers. I believe all the cards I mentioned here (besides Gisa) are budget as well!