Moving on
"Well, this is pretty good…" Rain thought. "Crossing one hundred kilometers in an instant. The weird thing is the fact that I feel sucked by the spell."
Each level increased the amount of mana Rain could use per cast, and that was multiplied by the distance. It was a very overpowered skill, but it followed some very specific rules that made sense as well. Portal Conjuration consumed more mana, but the spell could remain active for as long as Rain wanted. At the same time, Rain felt like he could literally connect two places with a single portal, and it was identical to the portals that the prison had created to make people travel across.
"They can use space magic… I am not surprised," Rain thought. "They never used that, though… they used a bunch of times blood sacrifice to summon their soldiers and monsters."