Alpha's Sparkle Beam

evocation cantrip
Casting Time: 1 action
Range: 15 feet
Components: V, S
Duration: Instantaneous
You draw upon the Positive Plane and call forth a cone filled with shining motes of silver and gold light. One creature you see within 15 feet of you must make a Constitution saving throw or be blinded until the beginning of its next turn.
If you target a creature that is undead or a fiend and it fails its saving throw, it also takes 1d8 radiant damage. This spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).