Accelobolt

Holding a small rock you send it flying with a force that increases rapidly until dissipating. make a ranged spell attack against a creature within range. on a hit, that creature takes Force damage that varied based on the speed of the projectile, as shown in the table below.

10ft: 2d4 
15ft: 3d4
20ft: 4d4
25ft: 3d6
30ft: 4d6
35ft: 5d6
40ft: 6d6
45ft: 5d8
50ft: 4d8
55ft: 3d6
60ft: 2d4