Tildwin's Psionic Lance

A focused beam of psychic energy forming a line 30 feet long and 5 feet wide blasts out from you in a direction you choose. Each creature in the line must make a Wisdom saving throw. A creature takes 6d4 psychic damage and becomes stunned until the end of your next turn on a failed save, or half as much damage and dosen't become stunned on a successful one.

The beam goes trough walls and can only be stopped by 1 inch of lead.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 2d4 and the range extends buy 10 feet for each slot level above 3rd.