Tentacle Whip

You warp your arm into a long tentacle and lashes out at a creature in range. Make a melee spell spell attack against the target. If it hits the target takes 1d8 bludgeoning damage. If the creature is Large or smaller you can force them to make a strength check, on a fail you can pull the creature 10ft towards you. 

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).