Rod of Corruption

Models with the Mark of Nurgle only.
Bound spell. Power Level 4. One use only.
Target any enemy unit on the tabletop. This unit becomes infected with Nurgles Rot and suffers D6 Strength 2 hits, distributed as shooting hits amongst the models in the unit. At the start of the caster's next Magic phase, the unit takes 2D6 Strength 2 hits. At the start of the casters Magic phase after that it takes 3D6 Strength 2 hits. and so on. Once cast, Nurgles Rot cannot he stopped.