Death Monarch and Will the Speedster. This two sworn brothers…..they were the culprit of that event
They disturb the time space continuum, breaking the already fragile fabric between world and induce a resonance call
That is how the Order of Thinkers called it.
A resonance call that synchronized parallel reality frequency and causes them to appear and merge with other worlds.
Usually a parallel world, other earths are separated by this frequency. So, they could not clash with each other.
A space just like this, like a mirror dimension.
Truthfully, inside this room, only Hikigaya truly understand this analogy of saying the parallel world as the other side of the mirror.
Those words are just to enhance understanding. The true explanation is even weirder and harder to understand. Unless you are scientist that is determined to understand the intricacies of these rules of the universe, most people would have given up trying to understand it
