Grimrock

I haven't actually gone to finish the trial since I haven't been around the area, but another tip in another thread lead me to understand that I had it all upside down. You are supposed to replicate the runes needed to cast the spell, not try to change it to another. That's pretty much what stumped ...

Soooo. I've found Bane, but the problem is

I think I'm in about the same situation. I have the Round Key, but I can't find the lock to put it into? There's no lock next to the door near the plates.

I can't seem to figure out Runemaster's Trial in Herder's Den. Any tips? Things I do know: You are supposed to change the spell that's being cast The 9 pressure plates equal the rune table Things I don't know: What spell to cast (no need to tip this, since I can just figure it out once I have the ot...