Vase

Vase is a member of the magic cabal Dusk Waiting to Awaken, who appears in Toaru Majutsu no Index SS: Necessarius Special Admission Test.

Toaru Majutsu no Index SS: Necessarius Special Admission Test
Vase was contacted by Arlands Darkstreet as Arlands was transporting the Necronomicon and told to make as many preparations as he could. After the ceremony to summon R'lyeh was carried out, Vase received the transmission with the data that the cabal was after and led his group to Stonehenge in order to construct the spell Blank Paper.

Abilities
Like other members of his magic cabal, Vase uses magic based on the Cthulhu Mythos.

Shining Trapezohedron
Using the Shining Trapezohedron (輝くトラペゾヘドロン) as told in The Haunter of the Dark Cthulhu Mythos story as a basis, he has a trapezohedron-shaped jewel with him to represent the jewel found in the story. In the story the Shining Trapezohedron was the medium used to summon Outer God known as Nyarlathotep (ナイアーラトテップ) and was normally kept within a special box while supported by seven pins. The jewel's power was not invoked when the seal was broken. Instead, it summoned Nyarlathotep when the lid was closed and the jewel was covered in darkness.

When preparing to make use of the spell, Vase tears a piece of paper several times and twists it to look like it has seven sharp stakes sticking out of it, resembling spider legs or fangs. He then sticks it to his car's door. Vase makes it so that his car represents the box where the Shining Trapezohedron was kept by using the piece of paper. Even if the “box” itself is fragile, it still has the seal needed to switch between summoning the evil god or not. Once that seal is made, the inside and outside are fundamentally cut off from each other.

Using a jewel simply known in the story as a Trapezohedron (トラペゾヘドロン), he needs only to invoke a chant and then cover the jewel in darkness to summon Nyarlathotep as he appears in the story. The spell summons a mass of black smoke and lightning shoots out in every direction. This lightning is enough to knock a fully grown man like Tatemiya Saiji unconscious.

However, as the jewel requires darkness, no matter how forceful the method, any light reaching the jewel is enough to end the ceremony. When exposed to light, the black smoke disappears instantly.

The chant:

"From the moment I become involved with you, I vow that I will not return alive. Oh mocking god, use the darkness filling this stone to destroy everything for this one last night."

Other
Vase also uses a red jewel, which he swings around in a leather belt like a sling and then propels towards the target like a missile. When the red jewel hits the target, it emits a pitch black darkness, which then absorbs the target completely even their screams. The jewel represents the red jewel that is said to call in a frog-like evil god found in some story in the Cthulhu Mythos. Most likely, this refers to the toad-like red jewel found and the unnamed creature that is looking for it found in the short story The Thing on the Roof by Robert E. Howard of Conan the Barbarian fame, and one of Lovecraft's correspondents in weird fiction.