When Flare starts fighting against the defenses is when things get intense, the defense's defenses activate and the backlash starts getting stronger, and stronger, and stronger, until it pretty much says: so, it was made by someone barely an eight of your age?, what about ten of them?
Or for short: The metal wasn't going to even let an almost-domain controller, centuries old earthbending archmage screw with it, and uses most of it's alignment-based power to counter her control to the point where the backlash reaches the maximun strength and sends a lighting through her channeled magic, but not just a ray, it attemps to go straight into the saboteur's magical source and fry it while empowering with it.
Jewel's plan works at first, making the lighning not really hit Flare but itself, causing sparks away and weakening, but then it would catch up, ignoring the magic channel's "point" and just plain straight trying to send the lightning into whatever channel there may exist, which would weaken itself and reach Night Jewel at minimal proportion because of her connection to Flare's magic and her own power beating back most of the metal's.
Ultimately, if Flare keeps up, the metal's lightning would become unstable and the defense system would explode, leaving the plate sparking up for a while, but the lightning would have been a sudden burst of whatever reserve was left, with more chance of hitting flare. Well done, you can now move onto trying to do it on a controlled full armor now, PROCEED!
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She winced once
"I don't know but-agh!....It doesn't seem friendly.... I think"
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Just as he charges the hooks and ropes would be pulling down more figures would appear, a pegasus would shoot from the ground, then be above him and try to tackle him to the ground, some on the ground would be going different sides to try to screw his maneuver and knot him, and another one on the side, with a spear or something, and in one of the sides a small sack.