Transformation: Adamantine Staff

This technique allows Enma to transform into a large, extendible staff that is as hard as adamantine yet as sharp as a sword. This staff can easily break through Hashirama Senju's Wood Release Secret Technique: Nativity of a World of Trees. He can also produce various body parts, such as eyes or arms, from the staff. Additionally, Enma can still move on his own in the staff form, allowing him to return to Hiruzen. Hiruzen Sarutobi wielded the staff with ease and great skill. Despite its hardness, Enma stated that he could still suffer damage from weapons such as the Kusanagi wielded by Orochimaru.

Trivia

 * The concept of an extendable staff is based on the story of Sun Wukong and his Ruyi Jingu Bang.
 * A nyoi, which can be translated as priest's staff but literally means as one (a person) wishes, is an auspicious decorative object associated with Chinese Buddhist rituals. It was made from bone or jade, with a head shaped either as a cloud or as a lingzhi mushroom and had a slightly curved handle, but the production and use of these objects declined after the Tang Dynasty.
 * Vajra is a mythical substance that can cut any substance, but cannot be cut itself.