Depleted Sunbeam

A beam of brilliant light flashes out from your hand in a 5-foot-wide, 30-foot-long line. Each creature in the line must make a Constitution saving throw. On a failed save, a creature takes 2d8 radiant damage. On a successful save, it takes half as much damage. Undead and oozes have disadvantage on this saving throw. Concentration required, 1 minute duration. Only castable while wielding the Depleted Blood of Lathander.