Wood Release: Thorn Wall |Sanctuary Technique

Name: Wood Release: Thorn Wall |Sanctuary Technique
Rank: A
Type: Ninjutsu
Used For: Defensive and Supplementary
Element: Wood Release
Range: 0-50 meters radius
Duration: Till Destroyed or Dispelled
Hand Seals/Charge up: Tiger-Serpent-Ram-Dog-Clap Hands
Description: This technique gives birth to a thick wall of thorns that rise about 25 feet high into the sky. The wall being so thick that one can't see through them nor walk through them. The thorn wall is created in a circular motion with the user as the center, creating a wall around them from all sides. This technique is ideal for creating a camp or safe haven of sorts. The user of the jutsu can create a human size path when wanted to allow their own people to leave and enter. The hole closes up though as they walk through it.
The wall is extremely sturdy and covers a large area. Syndra created this technique was studying the walls of villages, mimicking the circle shape of Konohagakure with this jutsu.
Weakness: Can't be cut with normal weapons.
One can go under the thorns or above them by flying.
Can burn them down with A+ Rank fire techniques.

the tech is A-Rank and it is also wood e.e, why does one need S-Rank fire to burn it. A-Rank should do

Oh, I was just thinking because of the mass of it that a S-rank would be needed.
But, I'll change it to A. :]