The Entity

The Entity is an almighty malevolent being, travelling through the cosmos and slowly consuming worlds. It creates the nightmarish Realms of the Trial Grounds to trap its victims, Survivors and Killers in an endless cycle of Trials, with the intent of feeding on its victims' strongest emotions, allowing it to grow in power and slowly consume another world.
The Entity is the cosmic embodiment of evil, turning worlds inside out with its very presence, a behaviour the Observer and his people witnessed when The Entity befell their home world. It corrupts its victims, slowly driving them towards madness and eventually pushing them over the edge, which allows it to snatch them from their world and trap them in its Realm. The Entity travels from Terra world to Terra world, growing stronger in its power until it eventually consumes all worlds in the cosmos. It is drawn to darker worlds, filled with chaos and darkness, as it chooses worlds that have failed to understand the metaphysical relationship between their thoughts and the world they live in, feeding off of their ignorance.
The Entity occasionally manifests itself in a physical form throughout the Trial Grounds given certain circumstances. The two most common manifestations come in the form of spikes or spider legs. The spikes are used by The Entity to block Exit Gates and Windows, or to destroy Pallets. The spider legs either shoot through the ground, piercing and killing any Survivor that did not make it out of the Trial Grounds within the Endgame Collapse timer, or manifest themselves around the Hook, to eventually sacrifice a hooked Survivor, and in case of a successful sacrifice, above the Hook to transport the sacrificed Survivor up into the sky in order to extract its sustenance from the sacrifice.