Gate of Moonless Night

The Gate of Moonless Night (無月の門) was a signature ritual used by the higher members of the Sindicate of Moonless Night to summon Incubeasts, powerful demonic kaiju, from the Underworld or Under Eden into the surface world for battle by sacrificing soul-possessed Magic Tools.

Use
This ritual was first created and used by Darius the Hellbourne to awaken his darkest creation De Szark from its inactive state in Yomihara and bring it into the surface world to wreak destruction upon. The process involved sacrificing the souls of four Magic Tools, objects that are possessed by souls captured and tortured by the Sindicate and Dark Horror, to be consumed by whatever would pass through the Gate that was about to open. Years after De Szark's destruction, the Gate ritual would be used more times as more strong Incubeasts would surface or be created and more Magic Tools would be formed, either as Darma Magic Tools, which are haunted-theme or Daspel, which are sea-themed. As well, the Sindicate would create a number of variants of the rite with specialized conditions and purposes.

The following kaiju that were summoned to the surface Earth via the Gate of Moonless Night were:
 * De Szark
 * De Lupanther
 * Mukade
 * Strong Gedor
 * Meravolgal; and
 * Dark Eye Dragon (the only non-Incubeast kaiju that utilized the Gate ritual).

Gate of Moonless Night Death
The Gate of Moonless Night Death (無月の門・絶) is a variant of the ritual, specially-designed for Ga Ryuzark. By sacrificing six Magic Tools instead of four, the rite begins by summoning the Gate and revealing a dark large cocoon containing the hibernating Ga Ryuzark. Afterwards, the demonic avian kaiju awakens. Unlike the regular version, this type of ritual could be done again and repeatedly shortly after Ga Ryuark would be destroyed, reviving it endlessly, as long as the faction involved has at least six more Magic Tools.

Void Gate of Moonless Night
Void Gate of Moonless Night (虚無月の門) is another version of the ritual that was used on the water-based Incubeast kaiju Gi Lugirin. Unlike other variants, the requirements for its completion exclusively rely on Daspel Magic Tools.

Gate of Moonless Night Period
Gate of Moonless Night Period (無月の門・ 終ピリオド) is another variant that is done to execute De Szark's finishing attack Ban Night Carnival. After a ritual user opens the Gate to banish the souls contained within two Magic Tools back to Yomi, the energy gathered from the banishment then channeled into De Szark to become powerful enough to unleash Ban Night Carnival without self-destructing.

Gate of Moonless Night 99
Gate of Moonless Night 99 (無月の門 ９９ザイン) is a very powerful variant that utilizes the Yamabahut to cast the artificially-crafted forbidden superspell Gekka Bankai Ga Ryumizu without any drawbacks, which involved doing so at the cost of the caster's existence. The Gate and the superspell could be unleashed after a caster sacrifices four Daspel Magic Tools, like with Void Gate. This ritual was done once by the Incubus King to not only bring Ga Ryuzark into battle against Minogami, but also create three mirror images of it and give the caster and their nearby allies enhanced agility, temporary invincibility and water-based abilities akin to those of Shiranui Mizuki's.

Fantasy Gate of Moonless Night
Fantasy Gate of Moonless Night (夢幻無月の門) is a variant of the ritual that was used by the Neo-Incubus Faction, remnants of the Sindicate gathered after the Incubus King's death, to summon their creation Gar Raganzark into battle. Unlike the regular Gate ritual, it can be done on the surface of any planet other than Earth.

Great Sin of Moonless Night

 * Main article: Great Sin of Moonless Night

The Great Sin of Moonless Night was an installation program to bring Sindicate-affiliated Orega Auras, biotechnologically-created kaiju, into the battlefield. This mechanism was based from the framework and methods of the Gate of Moonless Night rituals. Like the ritual, the Great Sin involved a sacrifice, this time destroying one of their own kaiju or Deletrons after an Incubeast-based Orega Aura was activated.