Alright guys we decided to make this guide to help understand the top floor so you guys can be less intimidated. Floor 30 has only two small regions where the gas can be set off. It can be set off at the steps soon as you come in, and the floor up north between the small pool and the first two steps. You can buy 12sky2 Gold Coins.
Forgive our photo editing; we do not have CS3 installed yet. We are feeling lazy at the moment so we used MS Paint, so bare with us. As you can see with these three pictures we placed where the gas points are. We are guessing everyone already knows about the steps from where you first come in and know how to get around it. If you do not, whatever you do to get around or over them Teleport for Elementalis, you can jump over the steps, come from the sides. We provide twelve sky2 Gold for you.
The picture that shows the number two is the northern spot of the map that can be triggered. If you are trying not to set off the gas, so you might want to avoid them at all times while in this room. We did place two area marks where it is guessed for the northern gas. The red area means caution you are too close and the yellow area meaning you just screwed everyone in Twelvesky2.