Ok, I've done everything I can figure out in the shadow ruins, and have been able to kill everything in sight. I've restarted many times in different earlier stages to try alternate orders. I'm in what I believe is the last room. I've gotten the sword of shadows. However I can not figure out where the last of 4 symbols is, "the triangle with a circle." I'm now in the room with the 3 gardians surrounded by pillars. I only have 1 shadow door available, the one on the left. I can't figure out how to activate the other 3 doors, nor what activates the 3 gardians. I'm sure they are related, however I'm totally stumped and have been for 2 and 1/2 weeks. I'm trying to get to the shadow lord just can't figure it out.
