Shrine Seal

This technique is used by Shion near the end of the movie. It first creates a barrier, then a hologram of the evil Mōryō. Afterwards, it lets Mōryō reign freely, and neither Shion nor Mōryō can leave the barrier until one takes over the other, which is decided by their chakra. Shion, however knew nothing about this, instead believing it will seal the demon away at the cost of her life.

Trivia

 * This technique uses a brand of Hand Seals that are completely different from the standard twelve.
 * At the beginning of the movie, Yomi used a variation of this technique by using only the portion of the hand seals — "Min → Shin → Gan → Reppyo → Shōzen → Mika → Dan → Raku → Shō" — to release a dark shock wave to shatter the seal on the door that locked Mōryō's soul.