Longinus

The Longinus (神滅具（ロンギヌス） Ronginusu) also known as Tools that Destroy God are the thirteen top-tier Sacred Gears with enough power to kill Gods.

Summary
Unlike most Sacred Gears which have only one ability, Longinus Gears have multiple abilities. 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.

Trivia

 * 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 Lycaon is a reference to the scientific name of the Eastern Timber Wolf (Canis lycaon), a wolf that lives in Eastern Canada.
 * Valerie Tepes is currently the only known female among the current Longinus possessor.
 * Out of the thirteen Longinus, three of them are known as the Holy Relics, they are: the Holy Spear - True Longinus, the Holy Grail - Sephiroth's Grail and the Holy Cross - Incinerate Anthem.