To unlock access to the passage, you will need to delve deep into the quest chain of Magatia, unlocking dark secrets as you progress through the quests on both the Zenumist and Alcadno sides. Near the end of the merging gigantic quest chain, you will be given a password that you MUST remember (you should write it down) and take to one of the passage entrances (from either the Zenumist or Alcadno side). Upon request, you must enter this password to permanently unlock the passage for your character. If you lose the password, it is said that you cannot ever recover it, so make sure to get it right.
The term "wall of text" only applies to ignorants who do not bother to read their opponent's mostly perfectly valid arguments before immaturily attempting to counter them.
