Eclipse of the Violet Vigil

You call down a cataclysmic eclipse of violet starlight and crushing shadow in a 30-foot-radius sphere centered on a point you can see within range. Each creature of your choice in the sphere must make a Dexterity saving throw. On a failed save, a creature takes 5d8 Force damage plus 3d8 Psychic damage, is knocked Prone, and has its Darkvision and Blindsight suppressed until the end of your next turn. On a successful save, a creature takes half as much damage and suffers no other effects.Immediately after the eclipse detonates, you can teleport up to 60 feet to an unoccupied space you can see that is in Dim Light or Darkness.