Jashin

Yes, I know this is OP but I am posting this from NRC and it is part of one of the characters I am transferring.

Name: Jujutsu: Shijihyouketsu - Sorcery: Death Controller Possessing Blood
Requirements: Takes all Special Ability slots (other than anything relating to a Bijuu), degrades style points by one.
Description: A unique ability that goes along with a small religion praising the evil god Jashin. It has two effects: it makes the user practically immortal and the actual technique. The immortality part allows the user to survive any injury with no noticeable effects on their performance. Even having their head cut off will not kill them, however, highly advanced medical ninjutsu or another ability with similar effects will be necessary to reattach the head and restore control over the body, and severe damage to the brain will probably be fatal. It is not known for sure, but believed that those who have this ability age normally.
The technique requires some preparations, which consist of two parts. One is tasting the enemy's blood - even one drop is enough - and the other is drawing a circle with an inscribed triangle in it on the ground, through whatever means. Once the preparations are completed, the user must step into the circle and trigger the technique. Their skin will turn black and there will be white lines on it, as if projections of their bones. From that point on, every injury they receive while inside the circle will be transferred fully to the one whose blood they tasted. This technique can only target one person at a time, any new blood the user tastes "overwrites" the previous sample. The blood sample "wears off" after six hours.
Although insanely powerful, this technique has a downside. The specific contract they sign with their god, which allows the immortality and injury transfer. They must also spend a lot of time praying and performing rituals, so their skills may degrade (you lose your "sub style" point)