Thorn Whip

Conjuration Cantrip
Casting Time: 1 action
Range: 30 feet
Components: VSM (the stem of a plant with thorns)
Duration: Instantaneous

As in the Player's Handbook except damage also increases again at 23rd level and 28th level.

Source: PHB 282

Changelog

Added epic level damage progression.
Altered spell school to Conjuration from Transmutation.