As an action, 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.}
On a success, the target is freed.
You can increase the damage by 3d6 for each additional mana expended.