Kyūyōkon Root

The is a mysterious root that is required to forge a new demon sword for Towa Higurashi in place of the Kikujūmonji replica.

History
Tōtōsai mentioned to Setsuna that she needs to locate the root in order to create a better sword for Towa to use instead of her knock-off Kikujūmonji. To locate the root, the girls need to search for Bokusenō. After the Sea Snake Woman is back to normal, Riku tells Towa to good luck to find the root. As the girls arrived to Bokusenō, it's located at Mount Musubi. It was mentioned to be the very thing that Kirinmaru is afraid of. As Moroha arrived inside the mountain, she had a first met with Kirinmaru's daughter Rion as she use the root to show Moroha where Towa and Setsuna were, and opens the portal. She dismantles the demonic barrier around the mountain into the Hoshikiri no Fue.

Due to Sesshōmaru being fatally wounded from Kirinmaru's Demon Fireball attack, Jaken realizes that only the Kyūyōkon is capable of removing and storing the divinely powerful demonic aura that continues to drain the half-demon twins' father of his vital haku little by little. Once arriving in the Sacred Tree of Ages, Towa takes no time in utilizing its ability to absorb and store vast amounts of demonic energy to save her father. Unfortunately, the cost of accomplishing such a feat drains her of her very life-force and seemingly kills her.

Physical Appearance
The Kyūyōkon Root gave off the appearance of a magnifying glass with a deep blue jewel at the top. It has a red thread tied to a small loop at the top and a white bead at the other end.

Abilities

 * Spyglass: From the dark blue jewel, Rion showed Moroha where her twin half-cousins Towa and Setsuna were since they didn't get pass through the strong barrier due to lack of spiritual powers.
 * Portal: Rion opened a portal, the red vortex and purple on the outside, that lead to either the Border of the Afterlife or the Sacred Tree of Ages.
 * Demon Energy Absorption & Empowerment: As mentioned by Rion, the root can absorb and release exhausting amounts of demon energy. It even greatly amplifies the attack power of the Twin Azure Dragon Wave by turning them from light blue to a bright green. It is this unique and useful ability that is used to save Sesshōmaru from perishing.
 * Life-Force/Spirit Absorption: Upon storing the vast demonic energies it is used to absorb comes at a price as it also drains its chosen wielder dry of their very spirit/essence as well.