Final Spark

After building up energy, a beam of light fires from you in a line 120 feet long by 5 feet wide in a direction of your choosing. Every creature in the line must make a Dexterity saving throw. On a failure, the creature takes 12d6 luminary damage and is Blinded until the start of its next turn.

At Higher Levels. When you cast this spell by spending Mana points equal to a 7th-level spell or higher, the damage increases by 2d6 for each spell level above 6th.