Ok. Here I go.
Summon the Three Ghost Demons
Name: Shishienjin, ๅ็ดซ็้ฃ, literally "Four Violet Flames Battle Encampment"
Type: B-rank, Supplementary, Mid-range (5-10m)
Users: Sound Four
This jutsu creates a box-like barrier around an area defined by the four users of it. Anything that touches with barrier will burst into purple flame. As long as the users of the jutsu remain active and unharmed, this barrier can never be broken.