(OOC: Lyrual was, of course, the name of the clan avoided to reach this place in the original puzzle)
*There do not seem to be any traps in the area. Simply the blank wall and the button. As Rinaldo approaches the wall to search for traps, the big map from before appears again, but this time, the green dot appears at HL. There's also still the button/crystal thing. Examining it yields no real clue what it might do, but it is the same colour green as the light on the map.*