Erasure flash

When you cast this spell, you begin chanting a long incantation. If you take damage during this time, you must make a saving throw as if you were concentrating on a spell. 

On your next turn, you finish chanting and cast the spell. A blast of raw magical chaos flows out from you in a line 500 feet long and 15 feet wide in a direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 20d10 force damage on a failed save, or half as much damage on a successful one. If this spell reduces a creature to 0 hit points, It dies instantly and is destroyed along with anything it was wearing or carrying (unless it is a magic item).