As an action, {ATTACK}}

A creature restrained by the vines, or one that can touch the creature, can use an action to make a Brawn or Nimbleness check (its choice) against your spell save Difficulty.

On a success, the target is freed. make a weapon attack.

On a hit, add your spellcasting ability to the attack’s damage roll and the creature must succeed on a Reflex saving throw or a writhing mass of thorny vines wraps around it as it is restrained for the duration. A Large or larger creature has advantage on this saving throw.

On a critical hit, add twice as much damage.

On a miss by 4 or less, add half as much damage.

Augment

You can increase the damage by 3d6 for each additional mana expended.