Yes Geto WOULD offscreen Yuki in the domain clash.

Jujutsu Kaisen Saisouku Databook. - [Page - 22.]

The Secret / Hidden Preeminent Beaut / Belter of an Orb utilised by Geto.
[Special Grade] - ‘Tamamo-No-Mae: Incarnate’
“Used by Getō during his fight with Okkotsu during the latter’s first year.
Tamamo-no-Mae is a legendary individual from the Heian period, said to be the incarnation of a fox spirit.

Jujustu Kaisen Popularity Poll.

Tamamo-no-Mae: Incarnate.
“One of Geto’s trump cards!”

Jujutsu Kaisen Official Fanbook. - [Page - 135.]

Imaginary (仮想): Manifestations of Oddities Born from Human Rumors.

“Urban legends, famous ghost stories, yokai, and other objects of fear that anyone can imagine will take shape and manifest as cursed spirits, even if they do not actually exist. The strength of their manifestation corresponds to the strength of people’s collective image of them. In the jujutsu world, cursed spirits of this type are registered as “Imaginary Vengeful Spirits.”

Young Fish and Reversed Punishment. - [S1;EP9.]

The Complete Collection of Japanese Yokai.

• Chapter Three: The Nine Tailed Fox.

“A legendary monster found in Chinese mythology. In Japan, it is known as Tamamo-no-Mae (玉藻前), a fox yōkai—a female yōkai formed from a fox taking human shape. It is also called the “Golden-Haired Nine-Tailed Fox” (金毛九尾の狐, Kinmō Kyūbi no Kitsune). It is famous for its white face, beautiful golden-colored fur, and nine separate tails. The designation “White-Faced, Golden-Haired” (白面金毛, Hakumen Kinmō) is said to originate from an account in the Shinmeikyō (included in the next passage) in which, when Tamamo-no-Mae returned to her fox form and was slain, a golden jar containing Buddhist relics was taken from her abdomen, while a white jewel was taken from her head."

The Shinmeikyō. [Page - 66.]

“Emperor Toba, the seventy-fourth emperor—whose personal name was Munehito—was the eldest son of Emperor Horikawa and Fujiwara no Ishi. He reigned for sixteen years, from 1107 to 1123, through the eras of Kajō, Tennin, Ten'ei, Eikyū, Gen'ei, and Hōan. Many years after his abdication, during the reign of Emperor Konoe, in the first year of Kyūju (1154), "something" in the shape of a woman presented itself at the Retired Emperor's palace.

That “Something” would go on to be known as Lady Tamamo, a beauty without equal beneath the heavens. Observers marveled at her, wondering whether she was some celestial being made manifest or a holy being descended into the world. The retired Emperor Toba was utterly captivated, favoring her above all the other women of his court. Her intellect matched her beauty; she was also well versed in the inner and outer scriptures—Buddhist and non-Buddhist alike—in Buddhist law and worldly law, and ignorant of none. She was a person of letters, answering every question posed to her one by one, leaving no stone unturned, yet carrying no burden. To all who knew her, she seemed a gonja—a Buddha or deity manifest in mortal guise.

Some time after Tamamo's arrival, the retired emperor fell gravely ill, and his illness grew worse with each passing day. His strength declined, his body becoming ever weaker, so much so that those about him feared that the life of their retired emperor was coming to its close. For all every remedy known to the palace physicians was tried, the sickness did not abate, when neither the physicians nor even the head of medicine could devise any means by which he may restore. Toba came to the conclusion that his affliction must be caused by a malevolent spirit. In response, Abe no Yasunari, Head of the Bureau of Yin-Yang, was summoned by the emperor’s decree, and promptly declared that prayer rites must be performed at once.

Pressed by anxious nobles and ministers to name the source of the affliction, Yasunari revealed the unthinkable: it was Lady Tamamo's doing. Because she was the beloved favorite, the palace could scarcely believe it, and his claim was met with fierce disbelief. The retired emperor himself was unwilling to accept so terrible a charge against the woman he had so greatly favored. The idea that someone as buddha-like as her could be the source of his deterioration seemed an impossibility. Pressed further, Yasunari disclosed the truth he had been hesitant to voice: "She is not a human being but the fox that dwells at Nasuno in Shimotsuke. Long ago, in the land of Tenjiku, she was the deity of a burial mound tied to King Hansoku, seducing the king into the infamy of taking the heads of a thousand kings, as is told in the Ninnō-kyō. In China, she appeared as Bao Si, a consort of King You of Zhou, and brought about his ruin—as the queen. Now she has crossed to our shores of Japan and come here to bring that same ruin upon our retired emperor."

Even after hearing this, Toba remained unconvinced. He demanded further proof, asking what could be done to determine whether Yasunari's accusation was true. Yasunari therefore proposed a rite of Taizan Fukun no hō. And shortly after, when the preparations for the rite were complete, Lady Tamamo was ordered by Yasunari to take up the ritual wand. She refused at first, proclaiming there was no need, yet when urged by the retired emperor, she stepped forward and took hold of the gohei. But the moment Yasunari began his ritual recitation, she shed the demeanor of the beloved consort, hurled the gohei aside, revealed herself in her true form, and fled the palace. At once the retired emperor's illness was dispelled, his doubts now put to rest, he apologized and lavished praise upon Yasunari, whose renown came to surpass that of all Yin-Yang masters of past and present, east and west.

Thereafter, the retired emperor, bitter and heartbroken, issued an imperial command to Miura-no-suke and Kazusa-no-suke, two renowned warriors of the eastern provinces, ordering them to pursue the tailed fox to Nasuno and destroy it. Unable to disobey the imperial command, they set out on their hunt. By virtue of its supernatural transformations, the fox possessed preternatural speed, bounding through the sky and racing across the earth. The warriors initially thought the task impossible. To prepare themselves for so swift a quarry, they trained under a hundred moons and nights by practicing mounted archery against dogs.

They then pursued the fox once more across the Nasuno plain. It was perhaps only because fortune favored their bows and arrows, but at long last, they managed to shoot the fox and return triumphant. Their victory was hailed as a testament to the fortune of the imperial house and the might of the bow and arrow, earning the two warriors peerless glory.

In commemoration of the victory, the retired emperor issued a decree. To commemorate the triumph at Nasuno, he commanded the two warriors to ride before him in their hunting attire. A red dog was loosed, and, at his command, they shot it from horseback. Greatly pleased by the spectacle, the retired emperor bestowed his approval upon them, and this display thereafter came to be known as inuōmono—the mounted sport of shooting at dogs.

Inside the fox's abdomen was a golden jar containing Buddhist relics (shari), which were presented to the retired emperor. On its forehead was a white jewel, which was given to Miura-no-suke. At the tip of its tail were two needles, one of them red; the red needle was given to Kazusa-no-suke. The fox's remains were placed in the Uji treasury, but its spirit lingered in Nasu, where it became the legendary Killing Stone—the Sesshō-seki.”

Jujutsu Kaisen 0: Novelization. - [Page - 438 - 439]

(Untranslated for now)

戦いの終局へ向けて、先に動いたのは夏油だった。

「知っているかい？ 特級を冠する人間は四人。呪いだと十六体存在する。これは、その内の一体——」

即ち、夏油はついに切り札を切った。

今まで呼び出していた、物量で攻める呪霊とはわけが違う。夏油の掌から、ドス黒い瘴気（しょうき）の瞬きと共に、明らかに格の違う呪霊が現れる。

十二単（ひとえ）のような、厳かな着物姿。

女性を象った（かたどった）、しかし悪意が張り付いたような、悍（おそ）ましい顔立ちの呪い

「特級仮想怨霊（かそうおんりょう）、“化身玉藻前（けしんたまものまえ）”」

玉藻前――古今東西、あらゆる伝承の中においても別格に数えられる、最悪級の妖怪変化（へんげ）。その名を冠する仮想怨霊ともなれば、疑う余地もない危険物。

呪霊、呪術への知識が浅い憂太であっても、“特級”を冠する怨霊となれば、里香と同格と分かる。

しかし、夏油はそれで攻め手を終わらせない。

Jujutsu Kaisen 0: Novelization. - [Page - 468]

(Untranslated for now)

特級仮想怨霊、“化身玉藻前”。 呪霊操術、極ノ番 “うずまき”。

夏油の繰り出した二つの切り札は、憂太と里香に狙いを定め、今まさに、この決戦にピリオドを打とうとしていた。

憂太の手にも、里香という特級の力がある。しかしながら、今その力を駆使したところで、対応できて、どちらか片方。化身玉藻前と里香がぶつかり合ったとして、おそらく力は拮抗（きっこう）。その間に “うずまき” を撃ち込まれれば終わり。

この状況、王手をかけているのは夏油の方だった。

Jujutsu Kaisen 0: Deformed Sticker Wafer.

Special Rare; Geto Suguru!!

“One of 16 registered Special Grade Curses, the Special Grade Imaginary Vengeful Spirit "Incarnate Tamamo-no-Mae". It was unleashed upon Okkotsu alongside the Cursed Spirit Manipulation Maximum technique, "Uzumaki". “

Jujutsu Kaisen 0: Kotodaman Collabration.

Playable Unit; Geto Suguru.

Super Skill; “Special Grade Imaginary Vengeful Cursed Spirit: Incarnate Tamamo-No-Mae.”

Effect: Deals Heaven-attribute (天) damage to a single enemy, with power scaled according to the unit's Blessing level (Fuku) // Activation Condition: Words with 4 or more letters.

Jujutsu Kaisen 0: The Stage.

Have fun scaling!