Forum:Does Ancient Gear Golem still inflict piercing damage against face-down Cyber Jar

I had Cyber Jar face-down, my opponent attacked it with Ancient Gear Golem, thus Cyber Jar's effect was activated but opponent thinks that Golem will still inflict piercing damage. However, I disagree. Who is correct? Notdoppler (talk • contribs) 17:33, March 7, 2014 (UTC)