This class of Sacred Gears is specifically named after 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, ten have appeared in the series thus far (with another one appearing in another series), 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 might 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. It is wielded by Cao Cao.
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 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. 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.
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. It is wielded by Vali Lucifer of the 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 the 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.
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.
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 is one of the Three Holy Relics, the Incinerate Anthem, is the "Holy Cross" on which Christ was crucified. Its current possessor is Walburga, one of the leaders of a group of Stray Magicians, Hexennacht, who have distanced themselves from the Three Great Powers and are seen as a threat from many other Magicians.
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 but is mentioned, 堕天の狗神-SLASHDØG-. Its current possessor is a blonde girl named Lavinia and is currently a member of the Magician's Association.
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.
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.