Forum:Chaos Ancient Gear Giant vs Dimension Wall

I would like to know if I can activate Dimension Wall in response to an attack of Chaos Ancient Gear Giant. If it is not a lot to ask, I would like to have an explanation of why it is legal (in case it is), since I gotta convince my local judge of the legality of the move, because it has been ruled as illegal previously by him in locals. Dragin12 (talk • contribs) 07:28, June 22, 2017 (UTC)