[@Natsume Honnaji]I'm sorry , but I doubt you can create an air-tight dome with simply magnetic control over metal, especially with only ten metals swords. I'm sorry, but that doesn't make sense, and also, even if you could do that, it's not like it'll be safe to get up shortly after since it's kind of in the air still. 

Also, even though your character wasn't close, you should still right that your character felt the ehat of something cause, as intense as Prince made it sound, you should have felt it and felt some kick back from the shockwave that blasted out the weakened section of the dome.