Blood Lightning

is a unique form of Lightning Release created by Kyōsuke Senju. It's also been called "Red Lightning" by some people.

Overview
The technique was created by Kyōsuke Senju when he was 15 years old. The name itself was termed by the color of the lightning generated during its usage. The creation of blood lightning was inspired after Kyosuke wanted to produce a lightning style that has no weakness when engaging to other nature style techniques. The technique was said to be almost impossible for anyone to learn it as it requires the combination of tailed beast chakra, natural energy, and mastery of lightning style to produce it.

Blood lightning is mostly used for offensive as its nature is destructive and conductive to almost any materials compared to normal lightning. To Kyosuke's capability in using this technique, he could produce a deadly short range offense to destructive projectile bomb of lightning.

Despite of its powerful nature, Kyosuke said the technique is still far from "perfection".

Legacy
Kyosuke has passed this technique to his adopted son, Ryūsuke Senju through a scroll in hoping he could master it even though he knew Ryusuke doesn't have tailed beast chakra; as to his knowledge extent.