Drums of War

3rd-level evocation
Casting Time: 1 action
Range: Self
Components: V, S, M (A pair of bamboo sticks)
Duration: Up to 10 minutes, requires Concentration
You create 6 musical notes in the air, which orbit around your head and give off a steady, marching beat for the duration. When you cast this spell, and as a bonus action on your turns after, you can expend one or two notes and send them streaking off in a 20 foot line. Each creature in the line must succeed on a Constitution saving throw, taking 2d6 thunder damage on a failed save or half as much on a successful one.
At Higher Levels: When you cast this spell using a slot of 4th level or higher, the number of notes you create increases by two for each level above 3rd.
Spell Lists. Bard