Elderthorn Thorn Whip

You create a long, vine-like whip covered in thorns that lashes out at your command toward a creature in range. Make a melee spell attack against the target. If the attack hits, the creature takes 1d4 piercing damage, and if the creature is Large or smaller, you pull the creature up to 10 feet closer to you.

The target must succeed on a DC 15 Dexterity saving throw or become restrained and take an additional  2d4 piercing piercing damage. It can’t regain hit points until the start of your next turn. A target restrained by the Thornwhip can use an action to make a DC 15 Strength or Dexterity check (target’s choice) to escape.

The spell's damage increases by  1d4 piercing when you reach 5th level ( 2d4 ), 11th level ( 3d4 ), and 17th level ( 4d4 ).