Orginally, there was another mirror. Each mirror was SUPPOSE to take you to a
certain level. 7 mirrors, first six for each level and the 7th to port you back
out to iceclad. I dunno when it happened but now all the mirrors take you out,
go figure. As for the "mysterious" 8th floor....That is the floor the mirrors
are on. From the 7th floor, take the spiral stairs up to the 8th floor.
Orginally it went this way.
Once to the 7th floor, you would fight Tserrina after finding which was her in
the back area (past the torch room) where the shrouded bats were. If you allowed
her to gate she would gate to the 8th floor beyond the 2nd locked door (the
first locked door could be opened with the large metal key dropped from
Vhalsera).
Then she would summon you 1 by 1 and kill the raid. Because no one could get
past the 2 locked doors unless you had ALREADY had Tserrina key you were pretty
much SoL. IF you did kill Tserrina, 1 person looted her key, raid followed the
keyholder up the stairs to the 8th floor, opened the 2nd locked door (at which
point it becomes soul bound now days) and you would find the "room of mirrors"
that took you to any floor or back out again.
This must have seemed too hard and it got NERFED. Now you only need the large
metal key to get to the room of mirrors. Tserria key only allows you to go to
the room of mirrors from level 1 and has no other use. You can also use the
level 1 mirror on the left to make it soulbound to you now days. As for the 7th
mirror that disappeared, that was the one mirror that was SUPPOSE to take you
back to iceclad.
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I know you believe you understand what you think I said, but I am not sure you
realize that what you thought you heard was not what I meant.