“If there are no other doors on the board, comes into play with a Cross Path Passage.”
FYI, the void dance chamber is a no outlet room from Black Fang Mission, and I can’t see why this wouldn’t move the Hero Posse marker twice, which is my reason for bringing it up, since it’s technically reveealing 2 tiles....
Nope, I don't think so. There is an open chasm tile in Trederra which has you placing four tiles at once, but you only move the Hero Posse marker once. I believe it would be the same here.