Forum:Face-off versus Mirror Force

I declared an attack with Amulet Dragon and my opponent activated Mirror Force in response and after that I chained Face-Off trap card. He claims that I cannot activate this card, because I was not in damage step. Even though I did attack his monster. So who's right, what are the rulings? DarkBladeX (talk • contribs) 20:08, April 2, 2016 (UTC)