Yin Release: Black Prison Barrier

After weaving the needed hand signals, the user releases and manipulates a vast quantity of Yin chakra to create a cube-shaped barrier around their target, with even the walls beneath their feet. Within the barrier, the target suffers immense mental disruption and chronic nerve pain, which is normally enough to make most opponents drop to their knees. The user can intensfy the strength of the cube by compressing their chakra, though the cube will shrink. Despite not causing absolutely no real damage to the target, this technique opens opponents to attack the moment the barrier fades. Its effects wear off slowly, which cripples many opponents.