[@13org] Magic is extremely obvious to begin with since if you pay attention you can tell a magic user is about to use some kind of magic through their catalyst for they will probably do a chant, or cite the spell's name with magical energy forming around near their catalyst, or are doing strange movement. granted a lot of people are idiotic enough to just sit there and watch for them to finish lol, and they could be resistant but not immune to restraining magic, I treat Immunity the same way I treat Immortality. both concepts can be overpowered depending on how their used. I mean your character probably has advantage to the incredibly deadly Siren monsters, since his hearing would allow him to detect when the siren is already singing a such high frequency that the others couldn't hope to hear.