While he could remember that he had seen something like this before, he couldn't recall any details, due to it being a magic thing, and therefore not something he was worried about. He was a stalker and shadow dancer, not a sorcerer or rogue; he left magic to the magic users or the people in charge of disabling them. Instead, after doing a quick circuit around the obelisk, he headed back to the group to inform the three mages what he had seen and see if they had any ideas on how to deal with it. Other than leave it alone.