Angelic Slash

You summon a giant spectral angel that appears around you before crashing its greatsword down in a line. All creatures in a line 30 feet long and 5 feet wide in a direction of your choice must make a Dexterity saving throw. A target takes 5d8 radiant damage on a failed save, or half as much damage on a successful one. A creature takes an additional 1d8 damage if it is undead or a fiend.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each level above 3rd.