Mordenkainen's Lost Notebook
8-level Transmutation
When you cast this spell, your body withers away to dust, leaving only a floating head, which quickly grows oversized and misshapen. Your eyes fuse together as a single orb in your forehead, and ten writhing eyestalks sprout from your skull. You take the form of a beholder (MM, p26) and gain 30 temporary hit points, which disappear at the end of the duration. While you gain the eye-ray powers of a beholder, you can use only one eye ray each round, and each of your ten eye rays can be used only once during the duration. For example, once you use your disintegrate eye ray, you can’t use that eye ray again during the duration. The transformation lasts for the duration, or until you drop to 0 hit points or die. When you revert to your normal form, you return to the number of hit points you had before you transformed. If you revert as a result of dropping to 0 hit points, any excess damage carries over to your normal form. As long as the excess damage doesn’t reduce your normal form to 0 hit points, you aren’t knocked unconscious. Your gear melds into the new form. You can’t activate, use, wield, or otherwise benefit from any of your equipment.