Era beginning/end
The Morningstar releases a punch so devastating, it obliterates 1/3 of an entire universe and giving it a new name: "The Semtex Museum Universe".
"A man named semtex with minor primoversal control attempted to use 4 pieces of metal which phased through each other but not through Morningstar and squish him infinitesimally small, which worked. To scale, the size of an atom to the size of Morningstar is estimated to be scaled as three trillion times larger than the entire multiverse and its extensions in comparison. He was so small that his current phase wasnt actually identified as matter anymore and reality itself seemed to reject his actual existence. Being that small, he launched a single left handed punch with seemingly minimal effort, which blasted with energy on new levels of small, a scale we dont actually have, and that blast obliterated all matter from the nothing that his fist impacted all the way to the edge of the gigaverse, with a range of 600 lightyears long, and he then grew back to normal size, because he wanted to. The blast defied the laws of conservation of matter, and God himself had to insert air molecules to account for the difference in matter, and the collapsing primoverse (the everything ever, extending past the heavens). Of course, semtex died."