Blackmore's Eldritch Eclipse

You launch a crimson twilight beam of light and shadow in a 5-foot-wide, 60-foot-long Line. Each creature in the Line makes a Constitution saving throw. On a failed save, a creature takes 6d8 Radiant damage and has the Blinded condition until the start of your next turn. On a successful save, it takes half as much damage only.

Until the spell ends, you can take a Magic action to create a new Line.

For the duration, a miniature black sun hangs above your head, outlined in golden-crimson radiance.  This mote causes the area within 30 feet of you to be considered dim light for the duration, replacing either bright light (including sunlight) or darkness unless it is caused by a higher level effect.