Sometime after Ivan left, the group immediately went into planning.
Here's the thing about secret realms. What Ivan had said previously a simply downplayed the capabilities of secret realms.
For one thing, although secret realms are amazingly abundant with resources, they are also extremely dangerous, and there's two reasons for that.
One, there are usually a large amount of powerful monsters than roam inside a secret realm, and two, the competition.
It isn't odd for someone to get killed by another being inside a secret realm. Sometimes it's because of a rivalry, or some sort of conflict.
Moreover, the Law grounds is an extremely popular secret realm, and due to its location, Kepler isn't the only world that has access to it, so fights between different world's are also bound to break out.
The competition was especially fierce too, because secret realms weren't open all the time, only during specific timeframes.