Sudden Restoration Technique

The Sudden Restoration Technique is a forbidden technique developed by the Second Hokage

Usage
This technique is used by having the user change a large amount of their life force into chakra, allowing them to temporarily increase their chakra levels to much higher levels than is normally possible for the user. Not only is the user's chakra levels temporarily increased, but their sense of pain is dulled to be near non-existent as is their sense of fatigue, allowing them to continue fighting even when fatally injured. The amount of chakra that this technique is so much that a shroud of chakra forms around the user.

However due to the sudden and drastic increase of chakra, the user experiences a severe mental strain, preventing the user from thinking clearly, often in the form of not being able to tell friend from foe. Also when this technique ends, all of the pain and physical exhaustion that was dulled will come back in full force, with the shock having killed many users of this technique in the past. Due to this the Second Hokage labeled this technique a kinjutsu not long after its development and was hidden away.

Trivia

 * Anybody may use this technique for a Konohagakure character so long as you explain how they got it.