Akira the Sixth [Jutsu]

Barrier Techniques:

Akira the Sixth wrote:Name: Rook's Guard Barrier Technique
Rank: C
Type: Ninjutsu
Used For: Supplementary/Defense
Element: N/A
Range: 4 meters tall.
Duration: 2 post.
Hand Seals/Charge up: Tiger
Description: The user forms the required seals. The user's chakra then forms a fast forming circle barrier in front of the user that is about 4 meters tall. This one man barrier is used if needing fast protection. The front of the shield appears to have a spiral like design on the front and is a shade of dark purple while the back side of the barrier is transparent. Allowing the user to still see forward, with out the barrier blocking their vision. While at the same time, it blocks the enemies vision of the user.
Blocks all none chakra infused weapons.
Can withstand up too C-rank jutsu.  
Weakness: Although it works as a two sided mirror, the shield only blocks directly in front of the user.

How does this barrier look from the back to your opponent? For what I see, the transparency would allow them to see you as you can see them, but you state they can not. Thus, what are they looking at?

Name: King's Castle Guard
Rank: B
Type: Ninjutsu
Used For: Defensive
Element: N/A
Range: 10 meters in length, 10 meters wide.
Duration: D-rank chakra per post.
Hand Seals/Charge up: Serpent-Tiger-Dog
Description: After the needed seals are formed, a sphere shaped barrier that even forms underground to protect the user is formed. The sphere appears to be made up of a transparent material, whenever the sphere is struck, words appear that are not readable, but shortly vanish after the attack is done. The powerful barrier protects from attacks from all directions and is large enough to protect multiple people. When the barrier is cracked the user can repair it with their chakra.
-Protects from all projectiles
-Withstands up too B-rank jutsu
-For c-rank cost, the user can repair damage and cracks done to the barrier just as fast as they're caused.
Weakness: Although the barrier protects attacks from all directions and can be recovered quite fast. The technique can drain chakra at an alarming speed.

B-rank jutsu: 20 Chakra cost
Every 3 posts(Starting from activation the Jutsu is active, below is the amount of chakra you will lose.
As stated by the Lasting Jutsu Cost found in Jutsu Rules and System
Also, how far underground?

Name: Knight's Guillotine Technique
Rank: B
Type: Ninjutsu
Used For: Defensive/Offensive
Element: N/A
Range: Within 18 meters,
Duration: Turn used.
Hand Seals/Charge up: Tiger
Description: The user creates a thin sheet of a barrier technique that is a square shape and 3x4 feet in size. This barrier can be created in front of the user to work as a shield, although that is not the real purpose of this technique. The thin sheet of chakra can form through object and cut through them. Being capable of decapitating limbs, splitting enemies in half, etc. The negative part of this is that the jutsu can't strike moving targets. Meaning that the enemy has to be immobilized some how. The technique can also be used to cut stationary objects like tree's, boulders, etc.  
Effects if used as a barrier:
Withstands up too C-rank techniques.
Weakness: Even though the technique is a barrier technique, it is not very effective as one. It also can't cut moving targets.

What do you mean by the bold?