Thanks! The Dark Lord now hands you Valefor's Emblem when you accept Catch Valefor!, and that emblem (not Shumi's coin) is what unseals the Demon's Doorway. If you're already on the quest, the emblem will be waiting in your Etc tab the next time you log in, as long as you have a free slot. This is LIVE now: refresh the game to pick it up.