I don't think the limited usage of Invisibilty is necessary, though if I were to limit its use of invisibility I'd give it the ability to use Displacement or Blur.
Hey, throw 3 racial HD and 8 levels of sorcerer and we've got a very frightening CR 10 on our hands. Its more than you can say for the current Ogre Mage.
Hey, throw 3 racial HD and 8 levels of sorcerer and we've got a very frightening CR 10 on our hands. Its more than you can say for the current Ogre Mage.