"Actually we also don't know anything about those portals. But previously on our planet we also needed to face this kind of portal after we began to advance in the world tower. Also I think you already have so many monsters that are familiar to you. Yes, those monsters you already saw in the world tower and right now they were attacking the earth."
" Actually not only as but many other people are also facing this type of situation on their planet. Most likely previously those elves also hide the fact that not only are they just getting attacked by those monsters from the monster world, but at the same time they are also getting attacked by the monsters from the world tower. Or it could be that they did not attack."
" But one thing was that as you can see, all those S-grade and even that SSS-grade attack earth. This clearly indicates that those monsters came from the 4th floor of the world tower." The dwarfs Saint explains all of this to Alex.
