Laeral's Silver Lance

Source: Forgotten Realms Heroes of the Forgotten

3rd Level Evocation (Cleric, Sorcerer, Wizard)

Casting Time: Action Range: Self Components: V, S, M (a silver piece) Duration: Instantaneous

Silver energy bursts out from you in a 120-foot-long, 5-foot-wide Line. Each creature of your choice in the Line makes a Strength saving throw. On a failed save, a creature takes 3d10 Force damage and has the Prone condition. On a successful save, a creature takes half as much damage only. Using a Higher-Level Spell Slot.
The damage increases by 1d10 for every spell slot level above 3.