Strange area in Demonis - how to get there?

[PennyT18]

Yeah, I noticed that, too. There's this large rock kind of thing in the way and it seems there should be some way of exploding it. Since you don't get to keep the horse when you go there, it's not like you can fly over it.

Also, on the map for Hades, there's a portal that says New Kordar or something like that. It's next to the Scarlet Tower. Found one of the lift things there but never found the portal. I'm not finished with the game, though, so maybe you use it later?