The Shadow Sphere is a 10 foot sphere, existing at the center of [[The Ink]] on [[Earth 44]]. Its exact nature is largely unknown, other than its abilities to generate [[The Ink]] and connect in a fashion similar to a [[Portal]] to various other extreme and dangerous realities, such as that inhabited by the [[Preacher]]. It appears to have the ability to corrupt individuals who pass through it as a portal, which turns their eyes black, gives them significantly increased strength and makes them particularly dangerous.
Whether the Shadow Sphere is a malicious entity in its own right, or simply a construct is currently unknown. [[The Sword]] appears to know knows of its existence, and wanted as does [[Cristina Thompson]], who used her mental control of him to attempt to deploy his troops through it when it connected to the reality that the [[Preacher]] had escaped to, which was filled with blood and mountains of corpses. The rebellion on [[Earth 44]] resulted in the retreat of [[The Sword]] and many of his troops through the Shadow Sphere, which turned them into the [[Black-eyed Army]]