The Cosmic Hand is Jack’s weapon and the source of his power. Originally a severed tentacle that morphed into a glove, it has now merged with Jack’s whole arm, giving him superhuman fighting abilities and connecting him telepathically to others. The Cosmic Hand symbolizes Jack’s connection to the monstrous realm, embodying the ambiguity and challenge of balancing his human identity with his monstrous appendage. Just as Jack himself grapples with the metaphorical line between human and monster, his hand—a hybrid of flesh and supernatural material—reflects his role as a character who exists in both worlds. It is therefore key to the novel’s exploration of The Contrast Between Humanity and Monstrousness.

The Cosmic Hand’s unpredictable, shape-shifting abilities mirror Jack’s adaptability and ingenuity. Because the hand changes form depending on Jack’s needs and situations, it represents the need to embrace the unknown and face the unexpected. By wielding the Cosmic Hand, Jack demonstrates his willingness to adapt to new challenges, whether it means fighting monstrous foes or uniting with them. The Cosmic Hand becomes a metaphor for Jack’s journey into uncharted territory as he learns to navigate his role as a hero.

The hand also acts as a physical manifestation of his experiences—both his victories and his traumas.