Fire Release: Internal Flame

This Fire Release technique appears to be initiated remotely upon placing the target in contact with a physical object such as a kunai or even a small toad, and can cause the target to spontaneously burst into flames. Any contact with him will cause burns.

They are said to be inextinguishable by wind or rain, and burn so quickly that regenerative techniques cannot keep up with them, leaving the victim's body completely charred in mere moments. The flames can, however, be absorbed and sealed away.