Blight

Make a spell card:
NameBlight
SchoolNecromancy
LevelArc 4, Blg 4, Decay 5, Drd 4, Sor/Wiz 5
ComponentsV, S, DF
Casting Time1 standard action
Recharge TimeGeneral
RangeTouch
TargetOne plant
DurationInstantaneous
Saving ThrowFortitude half; see text
Spell ResistanceYes