World Runes are Portkeys to different realms of magic - Theory

My theory, and it is a crackpot theory, is that the runes all are like port keys to other realms of magic, and thus let magic flow between the worlds. Im thinking different realms like the Targonian Golden city in the sky, The spirit realm, where ever the watchers originated, the origin of the Sun Disk, and potentially where Nagakbouros comes from. Perhaps explaining the reoccurring theme of the floating rocks that look like inactive portals around Runeterra, like in Targon, Ionia and Shurima At one point the runes all were unified in a place we have yet to see revealed on the map, but humans took the power and divided it up. Each Rune has access to a different realm of magic, not all are innately Chaotic but all are incredibly powerful and the runes caused things like the Fall of the Blessed isles, the power of blood magic, and the rise of the Darkin.

NOW what if this block in the flow of magic has built up so much that the space between worlds ripped open, magic litterally bursting at the seams, and let the void rush into icathia...

Its almost like the old lore when different champions were literally just from different worlds, like Taric was just from a Gem world, and Malphite was from a different world called the monolith and Kayle and Morgana had their own world, (Same as Nasus and Renekton) and they all just got teleported to Runeterra... except the lore team took that concept and made it more intricate and deepened the story a lot