This maybe a skill that is not very common and maybe this is the first time this is reported but i think is unfair that other moving mob skills work fine with the mobs in the LHC castle while this skill is not effective on them. Monster magnet/snatch/etc works fine on them but dragon breath dont. I think this also may apply on some area bosses but im not sure since i have not played with other jobs while killing area bosses.
Dragon breath does not work on any "boss class" monsters. Currently, such a skill can only be enabled for all or no boss class monsters. As an example, enabling dragon's breath to work in LHC would mean enabling it to work in a boss like Auf Haven, from a purely technical perspective. I am hopeful that we may be able to find a way to enable specific skills for specific mobs so that small tweaks can be made in LHC pertaining to some niche cases and breath a bit more life into the role of some classes. However, this requires dev work. Some resources: https://royals.ms/forum/threads/lhc-skills-ninja-storm-venomous-star.196251/ https://royals.ms/forum/threads/should-dragons-breath-work-on-bosses.199669/ https://royals.ms/forum/threads/show-hp-bar-of-lhc-mobs.194816/