Samiel and Yvraine rushed at the city walls that were enveloping the entirety of Zephystrand City, as runes inscribed around the walls lit up, creating a translucent runic dome around the entire city. This was one of the defensive measures of Zephystrand City, if not the best one.
"You have this place really well defended..."
Samiel said absent-mindedly as he looked at the runic barrier enveloping the entire Zephystrand City and all of the other defensive measures which were showing themselves at this time.
Yvraine once explained to him that all cities on most floors had some sort of defensive barriers and wards around them in case of situations like this or other attacks. Of course, as a member of the 13 Gates, the cities of the Nesser Dynasty had one of the best protections and fortifications in the entirety of the Cosmos.