When you enter the portal, a "description" will say something like the rogue stone in your inventory is vibrating violently and when you enter the Runes, it is gone!! ARGH!!!!
Also, I am one of those ppl with the tendency to go through EVERY single doors in the game when I play it the first couple of times.

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Long live H22A1!!!!!

Yeah. I read about it, too! I did try all the doors bit without a Rogue Stone at the time, didn't know how to enter the building, so I looked it up

With this battle summon summon summon
You can control 5 things at once so what do u do
Summon 5 wizards eyes
One for each baddie
Then pummel enemies w/range simple