In the map right before, there should be a second portal somewhere else (it's usually in a thougher place to reach). It should lead you to the downstair level.
at the map "another entrance" how to get down to the portal which leads to "another path" ?
In the map right before, there should be a second portal somewhere else (it's usually in a thougher place to reach). It should lead you to the downstair level.