Lava Release: Rubber Ball

Ninjutsu (Lava); 
Level: 	C (4)
Hand Seals: 	Bird
Casting Time:	1 standard action
Range: 	Short 40ft - 100ft
Area: 	Sphere (5ft + 5ft/caster level max 30 ft)
Duration: 	Permanent
Saving Throw 	See Text
The user expels a large glob of lava from their mouth, which quickly solidifies into a hollow ball that can be used to protect an object by surrounding it with the durable rubber-like material. The properties of this substance mean that it can both absorb and dissipate the force behind a blow when struck, resulting in it either deforming or bouncing upon impact.
Each half of the sphere has 25 hit points per inch of thickness. The ball starts 1 inch thick and gains an inch per caster level. A section of wall whose hit points drop to 0 is breached. If an opponent tries to break through the wall with a single attack, the DC for the Strength check is 15 + 2 per inch of thickness. Rubber has a DR 30/slashing or piercing. 
This jutsu may be used to trap a target, on a failed reflex save they are imprisoned within the sphere. Targets inside the sphere don't have line of effect or line of sight to any targets outside of the sphere and vice versa.