undertale theory

mister13eyond:

therightnippleofarcher:

undyne the undying’s design:

god of hyperdeath’s design:

note the similarities in the shoulderpads, gloves, and chest

god of hyperdeath: draws on the power of every soul in the underground to become a god

undyne the undying: “I can feel everyone’s hearts beating as one!”

hearts and souls are essentially the same in undertale. there’s also a heartbeat sound in the background of “but the earth refused to die”

conclusion: undyne the undying tapped into the same power as the god of hyperdeath, the power of every soul in the underground, in order to come back from the dead and kick your murderous little ass. the difference is that where god of hyperdeath took it by force, in undyne’s case that power was given to her willingly for the sole purpose of stopping you.

To further this- the reason Asriel absorbs almost every monster in the underground (every monster besides Napstablook, in fact) is that the souls of every monster in the underground are enough to equal one human soul. So with the power of the six human souls and the monster souls, which equal one human soul, Asriel is able to carry infinite power.

Undyne doesn’t have six human souls, so- with the willing strength of every monster in the underground behind her- she has power roughly equivalent to one human soul. As we know from Alphys’s experiments, the key characteristic of a human soul is Determination. By channeling the power of everyone in the underground, Undyne the Undying is able to try and use Determination like a human would- except, as we also know from Alphys’s experiments, monster bodies can’t handle DT. 

Undyne recieved the power of a human soul from the willing hearts of everyone in the underground, and was almost as powerful as a human. The only thing that stopped her was the limitation of her monster body.