First off does this spell effect constructs? undead? I would be under the assumption of no because its a necromacy spell and it says you shoot a black ray of necromantic energy(negative energy?)...
Second, is this a little overpowered in the fact it offers no save other than to avoid being stuned for a round?
Second, is this a little overpowered in the fact it offers no save other than to avoid being stuned for a round?