Being a Magic God, Nephthys is powerful enough to risk destroying the world with her mere presence unless precautionary measures are taken.[1][2] Due to her divinity originating from the crying woman from funerals - in particular the thousands of servants buried alive in a pyramid for a pharaoh's burial, Nephthys differs from other Magic Gods in that while others thoroughly honed their powers as an individual, she specializes her power as something which can be separated, split apart, cut away and swapped out.[8] Because of this, even after being weakened by Aleister's spell, Nephthys is still capable of destroying the world [12] and shifting the phases once.[8]
Due to her secondary organs being separate from her main body, Nephthys is capable of making use of them to escape if something happens to her main body, such as being 'exiled' by World Rejecter,[8] with part of her consciousness split off,[22] though having more than 99% of her body exiled away still took away almost all of her remaining strength, and her escape merely delayed her death.[16][22] Nephthys is also able to emit a shrill cry which causes matter to vibrate intensely, capable of instantly turning an entire magical faction to ash,[5] and she can turn her body into a small sandstorm that can change at a microscopic level, as her body is a collection of the dust that mummies become as they vanish into the flow of time.[22] As that collection of dust is comprised of parts that had made up human bodies, Nephthys is able to remake it into human body matter, such as fat, for another and implant it without risk of rejection, though her existence as Nephthys will vanish if it is all completely remade.[22]