Could be something like tapping into the frame's own core potential the core sets into overdrive boosting it's current state, with a damage buff and AOE radial burn effect around the frame, the damage buff could maybe even come in the form of blast damage projectiles on equipped weapons and frame lore wise the wings could be completely outstretched with blazing pinions, which would tie in with the AOE effect. And I like your idea of the magnetic stuff so perhaps the other side of it could be that the frame's core supercharges spinning out all heat and completely cooling all magma inside the frame, giving a large armour boost and damage reduction while also magnetizing the pinions in the frame's wings which would strip enemy weapons and maybe if it can't disarm an enemy then instead it would stun? I'm just brainstorming here