Ya dont see this much

I was wondering how to make the deep black pit like in the Black Citadel missions. Usually got the floaty islands above em. You dont see the black pits much in custom games, wondering if its even possible to do. I could make great use of it on my map.

-Kiradacon

That is the abyss; it is a tile in outland. Like the grass tile. You need to go into advanced/modify tileset and then check off use custom tileset to get it into your map.