True Polymorph Self

You transform yourself into a different creature or nonmagical object. The transformation lasts for the duration, or 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.

Creature. If you turn into a creature, the new form can be any kind you choose whose challenge rating is equal to or less than your level. Your game statistics, including mental ability scores, are replaced by the statistics of the new form but you retain your alignment and personality.

You assume the hit points of your new form, and when you revert to 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 are not knocked unconscious.

Your limited in the actions you can perform by the nature of your new form, and can't speak, cast spells, or take any other action that requires hands or speech, unless the 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.

Object. If you turn into an object, you transform along with whatever you are wearing and carrying into that form. The form can be no larger than 20 feet square. Your statistics become those of the object, and you are not aware of your surroundings or time passing in this form.