The Condemned Subway is the first dungeon for newcomers to on Rubi-Ka. It's made for low level players in the level range of about 5 to 25. Entering the dungeon is limited to level 25 max; while you can stay inside the dungeon and level beyond that you won't be able to reenter it once you've left it with a level 26 or higher. Warping into the dungeon is blocked (at least for players past level 25).