Wall of Thorns

You create a wall of tangled, needle-covered, resilient, flexible brush that grows on a solid surface within range of the spell. It appears within range on a solid surface and lasts for the duration. You can make it as a wall up to 60 feet long, 10 feet high, and 5 feet thick, or as a circle up to 20 feet in diameter, 20 feet high, and 5 feet thick. The wall blocks line of sight.

When the wall appears, each creature within its area must make a Dexterity saving throw. On a failure, the creature takes 7d8 piercing damage, or half as much on a success.

A creature can move through the wall, albeit slowly and painfully. For every 5 feet a creature moves through it, it must spend 20 feet of movement. In addition, the first time a creature enters the wall on its turn or ends its turn there, it must make a Dexterity saving throw. On a failure, it takes 7d8 slashing damage, or half as much on a success.

At Higher Levels. When you cast this spell by spending Mana points equal to a 7th-level spell or higher, both types of damage increase by 1d8 for each level above 6th.