Secret Technique: Ghost Sealing Jutsu

The user first writes a sealing formula on a scroll, which is then held in the user's mouth. The user then projects their soul as a ghost-like entity toward the opponent, which then enter's the opponent's body. The user then extracts the opponent's soul and seals it within the scroll. While useful, this technique isn't without drawbacks. The main drawback is that before extracting the opponent's soul, the user's soul must first dominate the opponent's soul in a literal battle of willpower within the opponent's mind. If the user can't dominate the opponent's soul, the opponent can resist or even break the technique. If this happens, the user's soul will be sealed within the scroll. The second drawback to this ability is the user is left totally defensless while using this technique, making it possible for someone to kill the user while they are using this technique, which will also result in the user's soul being sealed.