This class of Sacred Gears is specifically named from the True Longinus, the first and most powerful, and unlike other Sacred Gears that have more than one of the same type, the Longinus are utterly and completely unique, and only one of each may exist at a time. Azazel has stated that all Longinus are just a combination of one ability with another. Essentially, they combine powerful abilities that aren’t supposed to be combined.
Out of the thirteen, only seven have appeared in the series thus far, but Azazel has mentioned that due to the abnormality on the Sacred Gear system, and the Sacred Gears' ability for growth and change, more Longinus may be born.
The True Longinus (黄昏の聖槍（トウルー・ロンギヌス） Tōrū Ronginusu), also known as the Holy Spear, the Spear of Destiny, or the Holy Spear of the Setting Sun. It is the first and most powerful Longinus, as it is the same spear that St. Longinus used to kill Jesus Christ. A single stab from it can kill and vaporize a high-ranking Devil instantly. It was wielded by Cao Cao of the Hero Faction until Volume 12 when it was confiscated by Indra.
Zenith Tempest (煌天雷獄（ゼニス・テンペスト） Zenisu Tenpesuto) also known as the Prison of Bright Heavenly Thunder, is the second-strongest Longinus. It has the ability to control the weather and its elemental attributes. It is currently in the possession of Dulio Gesualdo, the most powerful exorcist who was reincarnated into an Angel as Michael's Joker.
Annihilation Maker (魔獣創造（アナイアレイション・メーカー） Anaiareishon Mēkā), also known as the Creation of the Demonic Beast, is a high-tier Longinus with the ability to create any creature that the possessor can imagine. It can make a countless number of creatures, and is therefore considered a top-tier Longinus. It was wielded by Leonardo of the Hero Faction until Volume 12 where it was confiscated by Indra.
Dimension Lost (絶霧（ディメンジョン・ロスト） Dimenshon Rosuto), also known as the Fog of Extinction, is a high-tier Longinus with the ability to block any attack using the mist that it creates, and transport anything inside the mist to any location. Though it has no offensive abilities, once the mist reaches the scale of countries, it can transfer an entire country and its people into the Dimensional Gap to be destroyed. It was wielded by Georg of the Hero Faction until it was confiscated by Indra in Volume 12 following the latter's defeat at the hands of Gasper Vladi.
Boosted Gear (赤龍帝の籠手（ブーステッド･ギア） Būsuteddo Gia), also known as the Red Dragon Emperor's Gauntlet, is a mid-tier Longinus where the Welsh Dragon, Ddraig, resides in. Its main ability, "Boost", doubles the user's power every ten seconds without limit, the only restriction being the user's own ability to handle the power. It is wielded by Issei Hyoudou, a member of the Occult Research Club and the Pawn of Rias Gremory's Peerage.
Divine Dividing (白龍皇の光翼（ディバイン・ディバイディング） Dibain Dibaidingu), also known as the White Dragon Emperor's Light Wings, is a mid-tier Longinus where the Vanishing Dragon, Albion, resides in. Divine Dividing works in the opposite way of Issei's Boosted Gear, in which its main ability "Divide", halves the opponent's power every ten seconds. It is wielded by Vali Lucifer of the Khaos Brigade's Vali Team.
Regulus Nemea (獅子王の戦斧（レグルス・ネメア） Regurusu Nemea), also known as the Lion King's Battle Axe, is a battle axe Longinus that contains the spirit of the Lion King, the Nemean Lion Regulus, residing within it. It has the ability to split the earth in one swing, and it also protects the user against any projectile attacks that are used against the owner. The Regulus Nemea is currently a part of Sairaorg Bael's Peerage as a Pawn, so Sairaorg is considered as its wielder.
Canis Lykaon (黒刃の狗神（ケイネス・リュカオン） Keinesu Ryukaon), also known as the Black Blade of the Dog God, is a Longinus wielded by Tobio Ikuse, better known under the alias of Slash Dog from the Fallen Angel organization, Grigori. It takes a form of a huge dog with golden eyes. According to Tobio, his Longinus is an independent avatar type and has its own instinct. Its abilities have yet to be shown in the series.
Incinerate Anthem (紫炎祭主による磔台（インシネレート・アンセム） Inshinerēto Ansemu), also known as the Chief Mourner’s Crucified Stand of Purple Flame is a Longinus that has yet to appear in the series but it is known to be in the hands of a leader in the group of Stray Magicians, "Hexennacht", who have distanced themselves from the Three Great Powers and are seen as a threat from many other Magicians. In Volume 14 it was revealed to be, along with the True Longinus and Sephiroth Graal, one of the Three Relics of the Christian faith, specifically the "Holy Cross" on which Christ was crucified.
Absolute Demise (永遠の氷姫（アブソリュート・デイマイズ） Absoryūto Deimaizu), also known as the Eternal Ice Princess, is a Longinus that has yet to appear in the series. While the Longinus and its user have yet to appear, it is known that the possessor is currently a member of the Magician's Association and Mephisto Pheles' servant.
Sephiroth Graal (幽世の聖杯（セフイロト・グラール） Sefuiroto Gurāru), also known as Holy Grail of the Secluded World is a Longinus wielded by Valerie Tepes. It is the "Holy Grail" from the Last Supper that Christ used, and the Grail of Arthurian legend. The Sephiroth Graal has the ability to make contact with the principle of life, where the possessor is been forcefully told about how the life and soul is made. The possessor also takes in the mind and the concept of the dead, the living, and various other things as they use the Holy Grail which would result in the possessor being broken by the abundance of thoughts that enters their heart and soul when overusing the Sephiroth Graal. A side effect of the corrosion caused by overusing the Sephiroth Graal is the possessor can talk with the dead from the other world.
Out of the thirteen Longinus, four of them are held by members of the Khaos Brigade, three of which are wielded by Cao Cao's Hero Faction, all of those three being top-tier Longinus.
Four of the thirteen Longinus contain powerful creatures, of which three have had roles in the storyline.
The Longinus Canis Lykaon is a reference to the scientific name of the Eastern Timber Wolf (Canis lycaon), a wolf that lives in Eastern Canada. It may also be a reference to Lycaon, the man that was turned into a wolf by Zeus as punishment for feeding him Nyctimus, Lycaon's own son.
Valerie Tepes is currently the only known female among the current Longinus possessors.
During the "Kyoto Incident" in Volume 9, the original Sun Wukong tells Georg that he needs to talk with his Longinus to better grasp its abilities. This suggests that the remaining Longinus that don't have a creature sealed inside them, instead have some other form of consciousness.