True Polymorph

Duration: 1 hour, Concentration
Choose one creature or object. You transform
the target into a creature or into an object. An
unwilling creature makes a Wis save, and isn't
affected on a success.The spell lasts for the
duration, or until the target drops to 0 HP. If
you concentrate on this spell for the full duration
it becomes permanent. This spell doesn't affect
shapechangers or a creature with 0 HP.