Planetary Celestial Gate Keys (HoloArc)

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Planetary Celestial Gate Keys
Kanji	惑星星辰関基幹
Rōmaji	Wakusei Seishin Seki Kikan
Information
Type	Holder Magic
Users	Various

The Planetary Celestial Gate Keys (惑星星辰関基幹 Wakusei Seishin Seki Kikan), more commonly known as the Behemoth Keys, are a set of eleven elusive keys which allows the wielder of them to summon forth one of these eleven Behemoths, Celestial Spirits of such power that they are said to be able to rival the might of gods.

Description

As previously stated, these mystical keys are utilized to summon extremely powerful Celestial Spirits. Unlike the Spirits summoned from the Zodiac Keys which represents a set of stars which forms into a constellation, the Behemoths summoned from the Planetary gate keys, each represents an important heavenly body in the solar system. The Behemoths are creatures of great will, making them very hard to control. In fact, if one wants the best out of these spirits, one should simply realize that one can not control them and that it is more about a connecting partnership rather than a situation of master and servant. The Behemoths will do as they please and will only follow those whom they deem worthy of following. Even then, they may rather prefer to do as they see fit.

Unlike the Zodiac Keys, which possesses a set amount of power, the Planetary keys deal more with a possibility for power. A summoned behemoth's strength is fully dependent on the bond  which the spirit holds with its key's wielder. A poor relationship will not only lead to a disobedient spirit, but also to a very weak spirit. Each mage can only wield a single key as carrying more than one will carry with it the spirits scorn, making it impossible to utilize them at their absolute power. The spirits generally are of nearly equal levels of physical strength, speed, and endurance, leaving the magic to set them apart from one another, but even then there they are more or less equal to one another, with a few exceptions. 

To efficiently wield a Planetary Key, one is required to have some sort of faith in the spiritual or a deep-rooted conviction. To lack these things will cause the summoning of a spirit to be a very taxing ordeal. If the faith or conviction is strong enough, the spirit will handle most of the burden for their wielder, making the summoning much smoother and next to free to perform. 

Spirits

List of Behemoths
Kua Fu: The Sun's Behemoth	Kua Fu is a most pride-filled being, loathing the idea of remaining on earth for any extended amount of time, deeming it unfit for a Behemoth's presence. Despite this, the mighty lion of the sun can prove to be the most faithful of the Behemoths, going to extreme lengths to safeguard and aid their key holder. Kua Fu is the only Behemoth to openly and freely allow their key holder to enter his realm to socialize. Kua Fu is considered to be the second most powerful of the Behemoth spirits. Kua Fu specializes in Gold Magic and Steel Magic. Claimed by Amara Cassiopeia.
Selene: The Moon's Behemoth	Selene is the greediest, the most self-obsessed spirit of them all. She has also been shown to be the hardest one to bond with, much due to her uptight personality and unwillingness to associate herself with humans. Despite this, she can come around and treat her key holder with pretty high regard should they stick around long enough. It is hard work, but possessing the third strongest Behemoth can prove greatly useful. Selene excels at crafting illusions for her opponents, distracting them with gorgeous visions of absolute bliss or torment them with the most horrific of images conceivable through the aid of "The Dreamers Gaze". Once sufficiently distracted, or if it should fail, Selene also makes use of Arcanism to crush her opposition. Claimed by Mariko Aesir
Freya: The Behemoth of Mercury	Freya is the more noble and kind hearted of the Behemoths, preferring to look upon faithful humans as children rather than servants to the spirits. Even if the bond between key holder and herself is weak, she will still go out of her way to appease her holder and make attempts to improve upon it. On the flip side, Freya is more often than not rather disliked by the other Behemoths. Even though she is not favored among her kin, she still finds it in her to express most positive emotions for the other behemoths. In combat, she is a fierce soldier, never pulling her punches against any of her foes as she deems it impolite. Freya makes use of Rune Magic and Memory-Make. Reserved for Blackdagger01
Efrit:  The Behemoth of Venus	Efrit is a being which all but embodies fire. Passionate, aggressive and hotheaded like few. As the spiritual brother of Ares, the Behemoth of Mars, Efrit is also very hostile. Anyone that isn't his key holder is fair game in Efrit's eyes. He always goes in with the basic mindset that anyone he does not know is a potential threat, despite his obscene power, leading to him painting humanity in a very broad brush of animosity. Despite this, Efrit is intensely loyal to his key holder for as long as they know how to treat the key, and should they reach a certain point of trust, he will keep his urges in check, if only to appease his holder. Efrit makes use of Magma Magic and Crash. Reserved for Black Dwarf Star
Ariel: The Behemoth of Earth	Ariel is a being which values the lives of all shapes and forms. She is a most loving and benevolent creature, the kindest of all the Behemoths. Ariel is the easiest of the spirits to get along with, but she will not pull the punches to one's emotional psyche. Despite her kind-hearted nature and sweet disposition, she carries a bit of a social flaw: She lacks all social inhibitions. She has no idea of how far is too far and what is considered too personal to speak of. Ariel is also very curious, which along with the lack of inhibitions, can be next to disastrous, not to mention that she is a shameless flirt. Ariel is a very efficient and powerful enchantress, making use of Enchantment for various purposes. Reserved for Kalina Inari
Ares: The Behemoth of Mars	The spiritual brother of Efrit, Ares is undoubtedly the most ferocious and battle-loving of the Behemoths, always looking for a fight wherever and whenever there may be one. While Ares is not too keen on the concept of killing, as it means one opponent less in the world, it has never kept him from giving his opponents a severe mauling if none stands to stop him. Ares pretty much embodies the concept of being an ass. He is uncaring to all and is therefore often considered to be the most difficult spirit to form a bond with. If it was up to him then he would rather prefer to have the whole world admire and adore him. Ares is a being of little smarts and a lot of brawn, making use of Titan and Strengthening Magic alike in order to overwhelm his foes with supreme muscle power. Reserved for Nearó
Tonnerre: The Behemoth of Jupiter	Self-absorbed, higher-than-thou, superior, powerful, superstitious, these are all words which perfectly describes the Behemoth of Jupiter. Tonnerre is the self-proclaimed leader of the Behemoths, and he wastes no time to assert his authority. He does this on the basis that he is the most powerful of all the Behemoths, surpassing all of them in magical prowess. Tonnerre carries a particular hatred towards Selene and Dahaka due to their abundant use of illusions as he deems it a cowardly practice. Tonnerre specializes in the usage of Lunar Magic for offensive means as well as see through illusions and rip them to shreds. More than that, he also possesses Cosmic Magic which allows him to make use of the full might of the cosmos to vanquish his foes. Claimed by Arthur Moshiyoto
Langosta:The Behemoth of Saturn	Langosta is the most despised of the Behemoths. This is due to the belief that she is the mother of all insects, making her the progenitor of all manner of pests in the world, making her quite unpopular amongst humans. Langosta is quite gluttonous, ravaging down any manner of food which appears before her. Despite the hatred aimed towards her, she is a very benevolent being, often bestowing vegetation and food to those who show her appropriate respect. Langosta makes use of Poison Magic and Plant Magic Reserved for Datwikiguy
Dahaka: The Behemoth of Uranus	The Behemoth of Uranus is a harmonic being, one which prefers to not fight even in the slightest. Unless his bond to his key holder is particularly strong, he won't lift as much as a muscle to aid them.Dahaka loves music with a passion. Everything related to music and song is a godsend to him. Dahaka carries himself very gracefully despite his great and bulky frame. His voice is soothing and musical, even when he attempts to speak normally. While he holds no hatred for anything or anyone, he regards Efrit with great distaste due to his lack of interest and respect for the musical arts. Dahaka makes use of Arc of Melody to enhance his allies performances and strike his foes with powerful magical tones and notes as well as create illusions. He also makes great use of Mach Magic to enhance the speed and striking power of himself and objects around him.
Jotun: The Behemoth of Neptune	Nothing freezes one's heart like years of being alone. Jotun is a being with a heart as cold as the harshest winter. Solitude is what he prefers above all else. He will not even associate himself with the rest of his kin, wishing for them to not interfere with his affairs. Jotun carries little regard for life itself as he sees it in a very grim light. He views it as the first step through one's existence until one reaches the real purpose of being, and that the first step is just filled with sorrow and misery, turning a blind eye to the joys of the world, choosing to focus on the vile things of it. Jotun makes use of Seith Magic and Ice-Make in combat to defeat his foes. Reserved for Scorpius.Water.Mage
Skoll: The Behemoth of Pluto	Despite his ferocious and frightening appearance, Skoll is a most gentle soul, preferring to speak meaningful conversations and solve disputes through conversations rather than violence, but rest assured, when push comes to shove, Skoll is one of the most fearsome combatants of them all. He will begin his battles easily, attempting to discourage his foes from continuing. Should this fail and they keep pushing him, they may find themselves at his mercy very quickly. Should a fight ensue for any considerable amount of time, he may turn savage, abandoning all reason for outright vicious and devastating bloodlust. Skoll makes use of Shade Magic and Historia of the Dead to mainly summon forth armies of combatants to fight by his side. Reserved for Garlicfork

Drawbacks

Like with almost everything, there is a price for all of this incredible power which the Behemoths will place at one's disposal. Once the spirits reach a certain level of power, and by extension the bond, it will become increasingly more difficult to fight at one's full potential, as much of one's power is used to fuel the gateway which brought the behemoth to Earthland. When the bond and the behemoth has reached their maximum potential, the summoner themselves will find their power diminished to almost half of what they originally held. This side effect will disappear the moment the Behemoth is sent back to their own realm.