Upper Limit: Pain

An Open Secret in Regards to Wandering Ruins: Power Limit

Hidden in corners all over Valresta, one can find doorways to planes of reality that are collectively known as [Wandering Ruins].

These hidden planes of reality vary in size, ecology and even general rules of physics, but do share a single commonality. That commonality being that every wandering ruin is chock full of resources and treasures that were usually beneficial to aether warriors from all walks of life.

Even if they weren't, they could still be sold for a pretty penny...and the bank that issued that penny.

As such, it would be safe to assume that powerful warriors and sects would make it their top priority to secure the location of wandering ruins and explore them thoroughly before anybody else had a chance to do so. Especially since, as the name implied, many wandering ruins had a tendency to randomly disappear either before or after they've been explored.