Crystal Soul Spear

You create a large spear of crystallized soul energy that sprays jagged crystals in its path. The spear travels irrevocably in a straight line, dealing 8d6 Force damage and 2d6 Piercing damage to any creature in its path. Any creature in its path must make a Dexterity saving throw. On a failed save they take full damage and must additionally make a Constitution saving throw or suffer an extra 2d6 Piercing damage for the next 2 turns from the crystal shard shrapnel. On a successful save they avoid the physical component of the spell and suffer half of the force damage component.

When you cast this spell using a spell slot of 8th level or higher, the Force damage increases by 2d6 for each spell slot over 7th level, as soul magic is especially destructive the more power the caster infuses into it. The spell is not without its risks, however, as casting this spell with an 8th or 9th level spell slot forces a Constitution saving throw. If failed, the caster gains one level of exhaustion.