The Tower of Colossus is located in the northern part of the Holy City Magic District. This steep tower, standing eighty meters tall, is surrounded and protected by twenty mechanical workshops. In times of peace, these workshops function as supply and production centers affiliated to the Tower of Colossus. They transform the research achievements of the tower into physical products and distribute them worldwide, while continually supplying the tower with blood, transferring the profits from sales and a wealth of resources for research purposes. However, once the city is invaded and defenses are breached, the Tower of Colossus rapidly morphs into a ferocious beast of war.