No. No, it's most certainly cursed in some fashion. And given the Venatori's prolonged occupation of the area and our altercation in the ruin itself--oh, there was a Tevinter mage found alongside it. I neglected to mention it; he clearly was suffering from a kind of corruption and is dead now--, I would suppose Corypheus' forces had some notion it was there. But whether they had any hand in its creation or were merely there to make contact with something that was already there, I cannot say.