As early as Klein's "slumber," after reaching a certain agreement with the Celestial Worthy, he had already grasped the power of the Sefirah known as Sefirah Castle and gradually fused with it, becoming "half a Great Old One" only slightly later than Angel.
This meant that he, too, had accommodated the Sefirah required by a Great Old One while possessing only a single pathway—the Fool pathway. Moreover, he had not been influenced by the mental imprints or residual wills within the Sefirah or Beyonder characteristics and turned into a monster who bore Klein's name but was, in truth, still that Celestial Worthy.
Of course, the Celestial Worthy was one of the personalities split off from the Original Creator. Like all Great Old Ones, the Celestial Worthy was undying and indestructible, with an eternally enduring spirit. Once a true Lord of Mysteries was born, the Celestial Worthy could attach to that pillar-level Great Old One and revive. Whether after thousands, tens of thousands, or even millions of years, there would always be a chance to return from history.
This was the same problem that Angel, and all the Great Old Ones on Earth's side who came after her, would have to face. The Malevolent Dragon, the consciousness born from the City of Calamity, was likewise undying and indestructible. It was simply that, after being sealed and defeated repeatedly, the dragon was now exceedingly weak and could be suppressed by Angel.
Sefirah such as the Knowledge Moor and the River of Eternal Darkness also contained lingering, indestructible Sefirah consciousnesses. Though they had weakened through fusion and erosion by successive generations of Dao Integrators, that did not mean newly born Great Old Ones could rest easy.
Angel suspected that part of the God of Steam's reluctance to accommodate a Sefirah and become the