Doubling the power of your commander, an infect creature, or just a generally powerful threat might be all it takes to eliminate an opponent
(You descended if a permanent card was put into your graveyard from anywhere.) Legendary Artifact Ramp (CTRL to add secondary) Recursion Angel of Indemnity Flying, lifelink When this creature enters, return target permanent card with mana value 4 or less from your graveyard to the battlefield
Each deck should have a play style that was distinct from the other decks
Though she takes a bit of work to get her engine going, once you get those two oil counters on her she can begin replacing oil counters fairly easily, and if you're playing an Instant and Sorcery-centric deck she can quickly become a major headache for your opponents
Nonetheless, any vampire EDH deck is happy to run Sorin, and I just happen to have one