Also, fun aside, I only played with that Savra deck in a single cEDH tournament in the basement of a midtown comic book shop that sadly no longer exists (if you know you know)
You need to be able to support a colorless Land, and if getting to isn't likely, it won't work, but Westvale Abbey is solid in many decks as a mana sink, and Ormendahl is a problematic threat no matter the situation
A character with 4 Strength deals four damage when challenging or being challenged, unless another effect changes the amount
We've got 14 cards that proliferate, letting us stack up the poison but also so much more in the deck
If you can get working on making a bunch of those black and white spirit tokens that the afterlife mechanic makes, you can sac them and trigger Teysa at the same time
This is one of several examples of Theros taking the gender inequality out of ancient Greece