Chaos (Riordan Novels)

Chaos is the first primordial deity and the creator of the universe. From it emerged the primordial gods. Besides being a deity, Chaos is a shapeless void below the depths of Tartarus, the realm embodied by one of their sons. Once someone enters Chaos, they become nothing and are dissolved by the void.

Powers
Due to its position as the embodiment of the void, Chaos is perhaps the most powerful entity in existence, with unmeasurable levels of power far greater than that of any other being, even that of any of its primordial children.

Amortality: As a primordial deity, Chaos is not technically alive. As such, Chaos is unable to die.

Manifestation: Like many other primordial deities, it is assumed that Chaos can manifest in a physical form to interact with gods and mortals.

Creation of Sentient Life Forms: As the first primordial deity and the origin of all other primordial gods, Chaos created the universe and all life within it, since the other primordial gods are the parts of the universe itself.

Void: Chaos is believed to be so great that it is able to truly kill immortals and erase souls from existence, possibly by permanently absorbing their essence. This is something believed to be initially impossible by all the Olympian gods, Titans, and even Ouranos, the second most powerful being in existence. All faded mythical beings end up within Chaos, essentially making Chaos the "afterlife" for immortals. Eternity: As the first primordial deity, Chaos existed even before the world began.
 * Pulling: Even passing near Chaos affects immortal and living beings. This was shown when Akhlys coughed, Percy Jackson felt like Chaos "leached the breath from his lungs and the oxygen from his blood", and Annabeth Chase's lips were tinged blue.