You transform into a wraith-like form, becoming incorporeal. While in this form, you have resistance to all damage except force and radiant, and you can move through other creatures and objects as if they were difficult terrain. If you end your turn inside an object, you take 1d10 force damage. You can’t melee attack if not with a magical weapon while in this form and have your movement speed halved. This spell can only be cast once per day.