Hydaelyn

You select any number of creatures in a 15 feet wide, 100 feet long line from you in a direction you choose and drop a spear of searing light on them. Each creature must make a Dexterity saving throw, taking 8d6 radiant damage on a failure and half as much on a success. If a creature is a Fiend or Undead, they take an additional 8 radiant damage, which is not reduced on a successful saving throw. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 2d6 for each slot level above 5th.