oh for the love, magneto has way complete control over magenizium their is no way black bolt is messing with him on that front. also black bolt is not getting though mags' shields if it was a strait up fight between mags and black bolt it would be close either way. Anyone that says black bolt would just utterly murder mags is on the verge of either being a Magneto hater or a black bolt fanboy. or they are just part of the general kmc consensuses that x characters suck and lose in everything and that all mags can do is lift metal things. I have no problem with people saying it would be close with black bolt winning but a lot of people are making it seem like black bolt is just going to walk up to mags and rip his head off.
also black bolt doesn't just use his screem all the time. In fact it's a weapon of last resort. When he was fighting thor he didn't use it also he didn't use it with quite a few others.