Liliana, Death's Majesty
Oracle Text
+1: Create a 2/2 black Zombie creature token. Put the top two cards of your library into your graveyard.
−3: Return target creature card from your graveyard to the battlefield. That creature is a black Zombie in addition to its other colors and types.
−7: Destroy all non-Zombie creatures.
Card Rulings
4/18/2017 A creature that is a Zombie and has other types, such as a Zombie Jackal, isn’t a non-Zombie creature.
Her -3 gets your best dude back from the grave, and can be used immediately as she's cast if you really need that beefy card you cycled in the early game. Oh yeah, discard costs and cycling are things that easily dump creatures in the grave for you to reanimate.
Her -7 is at worst, Wrath, at best, a one-sided Wrath. Solid.
I think she does plenty in the right deck. Walkers that can easily protect themselves and generate advantage generally see play, and she does both.
-3 can potentially immediately net you ridiculous value + sets up protection.
-7 can give you a one-sided wrath after being in play a few turns.
Aside from general playability as a 2-of type thing, I also see it as a sort of (albeit more vulnerable) Unburial Rites 2.0. If we get any more Entomb effects, it could be pretty devastating. As-is, we've already got some great choices with Grim Flayer, et al.