Eclipse of the Netherworld

Requires Jashin to be under the influence of Bane of Light. While shrouded in shadows, Jashin creates a boundary field extending from himself, concealing the sky of the area/zone he is situated within to be concealed with darkness, making day seem like night, or if it is already night, simply provides the additional illustration:

The moon or sun, whichever is the dominant producer of light in the sky, is concealed by a formless replicate which silhouette's the original body in darkness. This is what may be considered, an Eclipse, although the haunting surroundings cause the vicinity to resemble the realm of darkness, the Netherworld, enabling the technique to live up to its name. Whenever Jashin leaks blood within the boundary field, he need only mutter the name of this technique in romaji "Meikai no Nisshoku" to cause the blood to expand into a miniature pool of darkness, which will slowly expand, enabling a seemingly-endless horde of Gen'ei to flood into the area. Additionally if he focuses shadow-bound chakra into a mound, it will due to the 'blood' eclipse be shaped to form a corresponding pile-up of Gen'ei.

This technique may only be ended upon Jashin's request, or should the boundary field be dispelled by somehow removing the shadow-imbued replicate of the moon/sun through warping it away - absorbing the shadow-instilled chakra may also remove it, however the medium which absorbed it will have their chakra flow disrupted due to the invasion of foreign chakra, and additionally be linked to Jashin as though the utensils used to utilize the technique (i.e palms) were struck by his Verg Avesta.