You transcend transform into a Planetar.
While transformed your retain all racial and class features. As well as maintaining the use of all equipment. (Spellcasting is a class feature).
You do gain the Planetars ability stats, skills, damage Resistances, condition Immunities, senses, and Languages. Aswell as the Planetars Angelic Weapons, Divine Awareness, Magic Resistances, and Healing Touch.
You assume the hit points of the Planetar. When you revert 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 the your normal form to 0 hit points, you are not knocked unconscious.
The spell lasts for the duration, or until you drop to 0 hit points or die. If you concentrate on this spell for the full duration, the spell lasts until it is dispelled.
You choose what gear melds into your new form and what gear does not. Items that meld into the new form will no longer be useable until you revert back to your normal form.
* - (The feather of a celestial )