Susanoo

You create the form of a huge spectral humanoid around you. It starts out as a skeletal figure, after two rounds it moves to a humanoid without skin and after another three rounds it appears as a fully formed humanoid. This form has a weapon that looks the same as your weapon, except it is a huge weapon. The skeletal form gives you 150 temporary hp and a bonus +2 to AC. When it changes to the muscular form, you gain another 100 temporary hp, and your AC bonus rises from +2 to +4, and you have resistance to all non-magical damage. In its final form, you gain another 100 temporary hp and the AC bonus rises from +4 to +6, and you get resistance to all damage except force and psychic. If at any time you run out of temporary hp, the spell ends. You can make attacks with the weapon, treat it as your weapon of a huge size. Your special abilities and skills still apply to the huge weapon.