The Siege Crawler was first used at the Battle of Kvatch, in which it crushed the city's defenses, allowing the Lesser Daedra to pour through and slaughter the towns-people. It was later used again during the Second Battle of Bruma in an attempt to demolish the city. Fortunately, the Hero managed to enter the realm of Oblivion it was located in, took the Great Sigil Stone, and brought it down before it could reach the city's main gate.