Even hard granite gradually appear in their corrosion damage. And let them go on like this, the biggest advantage of the walls of the fortress, if he can not stand how long. Then, midair suddenly heard some weird sounds a bit to people snoring in sleep, but on the battlefield can make tens of millions two sides can hear, see this snoring how great . Human soldiers looked up, they saw, air those few, but weird crab in a large number of the abyss Air Force under cover.

At this point, these crab came to the position a short distance of the fortress walls. The attack of the crab, dolphin yellowgreen ball of light constantly spit out from their mouth, the average one second Breath, and every single ball of light is not very big, about someone head size, and they attack, turned nor human soldiers on the city, but the fortress walls.

http://blog.oricon.co.jp/reginadgf/
http://loveellen.hatenablog.com/