After making his next plan, Rein came out of the dungeon master's dimension to summon his lover Lucia here who was also a dungeon master. But there was a problem with that which was the fact that this was the last floor of a dungeon and to teleport someone here, she also needed to clear the previous floors.
It was possible for him to clear the whole dungeon again with Lucia as she was also quite powerful herself, but that would take a lot of time and even might allow the dungeon master of this place to understand their plan. Rein wanted to take control over the core as silently as possible without giving him any chance to plot anything.
After analysing the teleportation blocking function of the dungeon for some time, Rein judged that he would be able to teleport Lucia here with his specially boosted space magic. But for that to happen, the dungeon needed to lower its defenses a little bit.
