The will sent by Karl found its way to Lucifer. With a sense of anticipation, he unrolled the will, revealing the intricate essence of the will of Karl, the emissary of the Blue Empire. It spoke of a quest, an important mission orchestrated by the enigmatic King of the Blue Empire, one that piqued Lucifer's curiosity and ignited a spark of ambition within him.
According to the will, the King of the Blue Empire sought knowledge of the next heir to the throne of the Holy Empire. His desire was to forge an alliance with this future ruler, and thus, Karl and his team were dispatched to embark on this covert endeavor. Their directive: to unearth the elusive ghosts who harbored potential claims to the throne, to delve into the depths of their existence, from their combat prowess to their vulnerabilities, from their deepest secrets to their most guarded desires.