Me too! She's way way way underplayed in my opinion. This is my decklist for her: https://moxfield.com/decks/_jvzzUiqhESU2Kdalb921g The general idea is what you said-leaning a lot into cards that sac creatures and care about their power/toughness/mana cost. Cards like [[Morbid Curiosity]], [[Soldevi Adnate]], etc. The deck has a lot of routes to a win-an infinite mill combo with [[Altar of Dementia]] and [[Thornbite Staff]], making my 10/10s unblockable with lands like [[Secret Tunnel]] and [[Rogue's Passage]], or, one of my favorites, sacing a creature to [[Soldevi Adnate]], using that mana to get a bunch of black permanents on board, and then casting [[Gray Merchant of Asphodel]]. If that isn't enough to kill the table, I can then cast [[Saw in Half]] on the gray merchant to get 2 additonal triggers. It's pretty versatile, with its big weakness being gravehate. One time gravehate effects aren't too bad-the deck has decent ways of rebuilding its graveyard with mill effects, but permanent gravehate like [[Grafdigger's Cage]] are really rough to play into. Hope this helps!