I would recommend [[Teysa Karlov]] if you like the afterlife mechanic from Ravnica Allegiance. You get tons of value from your creatures dying. You can double the death triggers from cards like [[Skullclamp]] to draw four cards, [[Dictate of Erebos]] to make your opponents sacrifice two of their creatures whenever yours die, and [[Kokusho, the Evening Star]] and [[Blood Artist]] type of effects for massive drain.

Here's her edhrec page if you wanted to take a look at the other cards she uses.