I don't know, I just got the impression that the steel plate was kept in the cave. Something about how the architecture was so different from the rest of the Conventical. I mean, we know Kwaan wrote the steel plate in a cold cave, and when he wrote it that place would have been a cold cave. I see no reason for it to be moved, and several implications of it staying there.
Which is why I've always just thought what Ookla thought. There doesn't have to be a connection to the Inquisitors.
Always a skeptic...lol.
Can you think of any other reason for the Inquistors to have metal spikes?
I thought that TLR, after returning from the mountain, worried--and rightfully so--about the Ruin, and so when he found out about Kwaan's theory of metal and how it cannot be corrupted, he decided to create beings according to so...
Kwaan could be the designer, or very possibly the first inquistor.
This quote, I believe, is the most important one in the topic.
Inquisitors have metal spikes, naturally, because that's how Hemalurgy operates. However... this may not be what elmandr means here, but if you have a steel plate by your uncle who told you that the Hero of Ages wasn't really the Hero and that he needed to be killed, then you
build a temple around the steel plate (or put the steel plate in a temple, whatever. Not important) and said steel plate "I write these words in steel, for anything not set in metal cannot be trusted."
Then we have the "Steel Ministry", "Steel Inquisitors". Those first words on the steel plate sound a lot like a basis for a religion. Kwaan may not necessarily be an Inquisitor, but the
point is that the steel plate provided Rashek a motivation for his religion, being obsessed with metals and steel. I don't know, maybe he thought it would preserve truth better that way. Maybe the Ministry structures are actually
made of metal for this end, but I could be misremembering. Before MB3 comes out, I will do my third read-through of MB1 and 2 to make sure everything is right in my head.