'What the hell is that sword!', the first who saw Sera slashing her winged sword, this time aiming at his domain, actually deformed it in order to get it away from the trajectory of the sword's slash, he was unable to use the advanced technique of molding his domain to a desired shape in order to grant it special properties, like the undead head maid can do, for example.
But he as the top subordinate of Ereth, despite being "mass produced" did have a trick up his sleeve, he could actively modify it as he wished, the difference between this and what Rita could do, is that a modification is not a solid change, it's temporal and it doesn't grant any extra properties at all, he also has to control it at all times for it to work.
That being said, this special trait that only the first had, and was keeping a secret until now, was rendered useless in front of Sera's attack.
