Spell Details
Effect
You cause a massive barrier of thorny vines and brambles to erupt from the ground, creating hampering ground. Creatures entering or starting their turn in the area must succeed on a Quick save or be restrained until the end of their next turn.
Scaling
At 6th level, each hostile creature in the area takes 3d6 piercing damage at the start of its turn. At 9th level, the area becomes a 40-foot radius, and you can shape the thorns to create passages for your allies.
Special Notes
The effect requires natural ground and cannot function on worked stone or metal surfaces. The thorns are clearly magical and grow far beyond natural size.