Naknight Form [two-actions] Feat 10

When faced with danger, your nanites can envelop your body in a shimmering metallic armor. You gain the effects of a 5th-rank elemental form spell, except that you must choose either metal or water as your element, and you gain weakness 10 to electricity while the effect is active. At 14th level, you gain the effects of a 6th-rank elemental form spell, and at 18th level, you gain the effects of a 7th-rank elemental form spell.