Vampire Mud Dome Technique

Douka Dorodomu no Jutsu (Vampire Mud Dome Technique)
Ninjutsu (Doton) [Earth]
Rank: 9 (A-Class);
Range: Close (10 ft. + 5 ft./2 levels);
Area: 20-ft.-radius (S);
Duration: Concentration (up to 1 round/level) (D);
Saving Throws: None;
Chakra Resistance: Yes;
Chakra Cost: 9.

This technique traps every target caught in the area of effect in a mud dome that rises from the ground. The walls are 1 foot thick, have a hardness of 8 and 45 hit points. If damaged, the walls will regenerate completely in one post. The victims stuck in the dome will suffer 80 points of Chakra damage per post until they are freed or dead. In addition, maintaining the dome leaves the user vulnerable; if the user takes damage while concentrating on the dome, he must succeed a Concentration check or lose the technique.

The user also absorbs one point of Chakra per post while maintaining the technique (cannot go higher than the user's maximum Chakra pool). A Spot check (DC 20) could reveal some weak points in the structure, and double the damage dealt to the dome. If a Spot check (DC 25) is made, the character will deal triple damage to the dome.

A character making a successful spot check can share the knowledge with his allies.