You can inflict those you touch with a spellblight. 

Prerequisites: Wychfiend, hex class feature, class level 6th. 

Benefits: Once per day, you can bestow a minor spellblight upon a creature as a swift action. Select one minor spellblight, and once chosen it cannot be changed. By making a successful ranged touch attack, you bestow this spellblight on your chosen target. This hex can be chosen multiple times. Each time it is selected, you can bestow a different spellblight of your choice once per day. You must be at least 6th level to select this hex.