Undead forces

Raise an army of the undead to do your bidding, fill a 40 foot square, with you at the centre, with undead of your choice between skeletons and zombies, the area of the spell goes up by 20 feet for each level it is up casted, additionally, when up casted to 6th level and above, it gains an undead general who appears diagonally infront of you by one square, it also gains 7 elites