Who doesn't know how to talk tough? In Otto's view, the Spider Goddess's words were equivalent to telling him not to leave after school.
Not bothering with the Spider Goddess, Otto wouldn't leave this plane so easily without being fully prepared.
Now that he had offended so many deities, he'd probably be beaten to a pulp as soon as he stuck his head out.
Having shattered the four gods' schemes once again and with the Blood Fortress already destroyed, all that was left to deal with were the scattered War Children and the underground army from the Dark Domain.
But these matters were Gaz's responsibility, so Otto didn't need to worry too much.
However, it seemed that Sofia and others were quite interested in the core of the Blood Fortress or to be precise, relic left behind by the Spider Goddess.