This is actually a great idea, if we still have energy drain mag proc then this a great way to do it. Creating a condition is nice.
Personally, I would prefer no energy drain procs at all in the game, though. Let the players use their abilities. Honestly, Magnetic Proc should just do what it does to enemies, destroys sheilds. Energy drain is no fun in this game. I would perfer my personal energy management to be the only thing I need to worry about, please and thank you.