I Renounce My Humanity

Fort Praxidike was no ordinary fortress. It was built by Haydyn's sorcerers using advanced earth-styled magic: the blocks were made from mud, after which they were placed on top of each other and reinforced with strengthening magic. Hence, the fort was not as sturdy as other forts built with bricks, and it could easily collapse at any time. 

This was the reason why the Church and the sorcerers went to great lengths to erect layers over layers of protective barriers around Fort Praxidike, to protect it from magical bombardments. It had another special layer of fortification spells to address its lack of stability; without this, a single large-scale spell would send the fort tumbling like a set of dominoes.