Dance of Eilistraee

When you cast this spell, you momentarily transform into a flash of brilliant moonlight. You may instantly move up to 20 feet, and during this movement, you are incorporeal and may pass through creatures, translucent or transparent objects (or objects with gaps, such as bars or opened doors), and across liquids (but not upward through empty space). This movement does not provoke opportunity attacks, and difficult terrain costs no extra movement. If you would end the movement and return to your normal form inside a creature or object, you are instead shunted to an adjacent square (at random or at the DM’s discretion) and take 2d6 force damage. 

During your incorporeal movement, any creature through which you pass must make a Constitution saving throw, taking 3d6 radiant damage on a failure and half damage on a success. A creature can take this damage only once during your incorporeal movement.

When you cast this spell using a higher level slot, the distance of your incorporeal movement increases by 5 feet per level, and the radiant damage increases by d6 per level.