Some nice ideas here when put together.
Pale Master can cast raise undead on a fallen ally. They have to click to accept it. Duration is 1 minute per 2 caster levels. HP should be based on caster level as well (No 800 HP Half-Orc Barbarian Lich's.
). Can only be a form that the pale master himself/herself has. Otherwise, gains all of the undead forms abilities and drawbacks while in this state. Can be raised back to life at any time by a cleric or resurrection shrine while in this state, and at the end of the spells duration player falls back dead.
Should probably be a 9th level spell like True Resurrection.
Sounds kind of fun and not too overpowered with a duration and limiting HP to caster level.