#anyways ik this is mostly undertale centric so feel free to talk to me abt undertale

[fellcharas]

yknow, how can we be absolutely sure that the creation of his that gaster fell into was the core?

of course, there isn’t always a need for repeating the name, and toby could mean that the core was what gaster fell into, but i reeeally don’t think that’s what happened. i’ve talked before about how it’s possible gaster fell into a black hole (a likely accident from the creation of the machine in sans and papyrus’ basement, assumed to be a time machine), but here’s some other evidence:

geothermal energy is the thermal energy in the earth’s crust. it originates from the formation of the planet, as well as radioactive decay of materials in (uncertain but possibly) equal conditions. it’s very, very hot in temperature.

this would make sense, given undertale takes place in the underground - gaster would likely have harnessed geothermal energy and, as alphys says, convert it into magical electricity. she cuts herself off out of embarrassment so we don’t know much beyond the structure of the core and how it works, but it can be assumed that if it’s converted into magical electricity, this must aid in the function of living for monsters somehow. however, gaster is said to have been a slow worker, which could be why there aren’t as many monsters in the underground as we’d think (an easy way to save time for designing unique characters on toby’s behalf), as many of them could have died out due to poor living conditions.

but... how would gaster have shattered across time and space by falling into the core, something that as far as we know, only converts geothermal energy into magical electricity?

he “vanished.” he “shattered across time and space.”

(x)

this was gaster’s next experiment. this was after he created the core. negative photon readings, meaning there’s no light, and the darkness keeps growing - sounds pretty damn similar to a black hole. a black hole of this caliber could no doubt destroy a machine. and a common thing with time travel is black holes, given that many perceive them as actual “holes” and “tears in reality” rather than celestial bodies. if one were to avoid the singularity (a region where space-time becomes infinite), they could theoretically end up in a different space and time.

so gaster fell into a black hole, created by his time machine. whether it was on accident or he intended to do so is unclear. i don’t know why he would do so willingly, but in entry number 17 he doesn’t seem very worried about it. and - given that there is such a thing as the black hole information paradox - it makes sense as to why everyone would forget about gaster. because his information is lost to the outside universe, the universe that remains outside of the black hole.

what does this mean for deltarune? well, it’s entirely possible gaster could have entered more than just a different space and time... perhaps a new universe. with different rules. as toby said. there’s the theory of black holes creating new universes, purely hypothetical, but given that this is fiction we’re talking about it could be possible that this is the case.

is gaster the god of deltarune’s world? what role does he really play, given all of this speculation? what’s his goal, why is he doing this, if he even is? i don’t know. let me hear your thoughts though, i’d love to hear them