Metamorphosis

You assume the form of a creature of the same type as your normal form, or any other type except Aberration, Celestial, Construct, Elemental, Fiend, or Undead. The assumed form can be of a CR no greater than 8.   You can't choose a creature with a size larger than huge, or one with an incorporeal, ectoplasmic, or gaseous form. Your game statistics, including mental ability scores, are replaced by the statistics of the chosen creature. You retain your alignment and personality.   You assume the hit points of your new form. 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.   You are limited in the actions you can perform by the nature of your new form, and you can't speak, cast spells, or take any other action that requires hands or speech unless your new form is capable of such actions.   Your gear melds into the new form. You can't activate, use, wield, or otherwise benefit from any of your equipment.