Sealing Technique: Cursed Sword of Black Ice

By creating a weapon out of Black Ice and marking it with Juinjutsu the user can kill and simultaneously seal an opponent. This works by stabbing an opponent with the created weapon and moving the curse mark from the weapon onto the opponent to prevent them from moving as ice starts forming on their body. With the curse mark preventing the opponent from moving this almost guarentees the opponent's death, and sealing so long as a third party does not assisst.

Trivia

 * Only the Yuki Clan in Kirigakure know how to use this technique