Yes, pretty good.
Also note how using this while an enemy uses jutsus can halt them from fully forming them (if used on time or during hand seals).
( Ura Shishō Fūinjutsu ) - Reverse Four Symbols Sealing Technique
Rank: S
Type: Offensive
Range: Short – Mid
Chakra cost: 40
Damage points: 80
Description: This is a sealing jutsu that is placed upon the users body, setting it to activate on the users death. It seals everything within a large, nearby, spherical into the users body.
Note: Can only be activated upon the users death.
Note: The placement of this seal must be stated on the user's biography.
Basically a seal that is on your body, and activates when you died. Not much can be said about this so you get it auto. The range of the sphere is pretty high. (up to mid)
( Shishienjin ) - Four Violet Flames Battle Encampment
Rank: A
Type: Supplementary
Range: Short-Mid
Chakra Cost: 30
Damage Points: N/A ( 60 if the opponent makes physical contact with the barrier )
Description: This technique requires four people to use. The people must be standing forming a square, they will then make the snake handseal and clasp their hands. A barrier forms around them on all sides, stopping anyone from outside from coming into the square. If they touch the walls, they will be burnt by violet flames. The casters can add a secondary barrier inside to prevent them from being attacked by enemies caught within the square; although by doing so, they are unable to attack as well.
This one can be used by 4 clones (yourself and 3 clones would defeat the purpose). Doing the hand seal it creates a cubical barrier that burns stuff, and people. You can do another layer, so you position yourself between the 2 layers and it protects you as well. What seems like a downside about this one to you?