So, the full M13 set has been spoiled.
SpoilerThere is one card that immediately cached my interest:
A 2/2 for 1 at instant speed is nice, but the fact that it can target creatures in any graveyard makes for great utility.
"So, you wanna reanimate Griselbrand? Nope, I get a 2/2 instead."
"Undying/persist, eh? Nope, 2/2 zombie for me."
"Bloodghast/Ichorid? Not today!"