Zartha, Plague Mother

-1: Sacrifice any number of permanents, target opponent loses that much life. Put a loyalty counter on Zartha for each Virus sacrificed this way.
-2: Target creature loses its name, color, and all types and becomes a black and green Virus with base power and toughness 1/2.
-9: Each opponent loses life equal to the number of Viruses they control, they sacrifices all non Virus creatures.