Vampiric Plague

At the beginning of your upkeep, put a
-1 / -1 counter on each non-vampire
creature. If a non-token creature dies this
way, its controller flips a coin. If tails you
gain control of that creature except it is a
vampire in addition to its other types.
The horrors of Dracaria hunger for
destruction, tainting all life that comes near
its writhing tendrils.