Defend the Siege

Front and center, $n! We're beginning our assault on Wintergrasp Fortress. Those Horde animals think they can hide cowardly behind their walls? Well, I think not! We'll show them the power of Gnomish technology and smash their walls to bits!$B$BHowever, even the most powerful siege device is helpless without a crew. Pilot or protect one of our siege vehicles as it destroys three of the Horde structures.