When it comes into play, you get to make two 1/1 Faerie Rogue creatures with flying, which is not bad, but not great given its cost
One of the most popular Magic: The Gathering Planeswalker card designs is that of Jace Beleren
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
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)
This is one of several examples of Theros taking the gender inequality out of ancient Greece
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