"No, but maybe I should have. The ones before were purely layered defenses which was why it started to sting after a few hits. ...To be honest, I designed the layered defenses based on Muggle principles. Dont let your parents know." He chuckled quietly as he showed Draco how the mirrored reflect worked- it captured a spell's energy and let him send it out in any other direction.

"The danger here is if you can't contain the energy, it will blow up in your face as I learned the hard way several times."