"His attack was a mistake. Bluntly put, he messed up. The mages in question who gather in the catacombs take on apprentices, and sometimes, as you probably suspect, apprentices can do stupid things with their powers, especially when they learn a new, powerful spell, or break through to a higher level of power, then they think they know it all. In other words, by causing such a mess at the inn, this mage risked exposing his group, which he did." The pool of foresight added.