Board Thread:Fun and Games/@comment-26134263-20180204095147/@comment-24900075-20180408013049

Yes. It's basically causing your own energy to kill itself and tear itself apart. So if an opponent has an ability to negate any external forces or have any physical barriers, Feedback would still work since it's your own energy tearing yourself apart. That's why the stronger the character's innate powers are, the more effective Feedback is.