Clarent Blood Arthur

A stroke of blood red energy  a line 60 feet long and 10 feet wide blasts out from you in a direction you choose. Each creature in the line must make a Dexterity saving throw of 21 DC A creature takes 12d6 Force damage on a failed save, or half as much damage on a successful one.
The energy destroys everything in its path unless it is protected by a spell of similar power or above.