Conjure Barrage

3rd-Level Conjuration
Casting Time: 1 action
Range: Self (60-foot cone)
Components: VSM (one piece of ammunition or a thrown weapon)
Duration: Instantaneous

As in the Player's Handbook with the following added:
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.

Source: PHB 225