Skeletal Touch

(Wizard Necromancer required) You have a skeletal arm (whichever arm you choose) that works as a normal arm would but you can choose to touch a living organism within range you do 1d4 necrotic damage for every turn your hand is on it. When you remove your hand the flesh you touched will look as if it was starting to decay and have disadvantage on any rolls that involve where you touched them. (Ex: Arm, dis on attack rolls. Leg, dis on acrobatics checks. Chest, Dis in constitution saving throws. Head, Dis on saving throws against being controlled.) Once you reach level 6 you can use your skeletal arm to cast create undead once per long rest, twice at level 12, and three times at level 20