The Monster Magnet Phenomenon
"Billions! Damn! How much will they get from these?!!" Lina got tempted, the same as Ibra and William as well.
"It's not that easy to build a portal," William sighed, "aside from the need of many space element spirit masters, lots of masters with engineer elements, there is a scary cost for these portals. This place must have spent hundreds of billions before starting to work."
"..."
The other two sucked in a cold air of breath, while William found their reaction a bit funny.
"What? Did you two mistake that doing such a business is cheap? If so, then why would I not try to do it? Why not every single academy would aim to build such portals there?"
"Well… If we get a portal zone back at the city, and aside from getting lots of wealth from it, we can gain access to locations away from the Scorching Lands zone. Like this, we don't need to struggle or fight the same kind of monsters inside that old man's worlds… Tsk! We need to do such a thing later, ok boss?"