Forum:MBAAS vs Catastor

I set a faced down My Body as a Shield last turn. And I have a face up Lightsworn monster. My opponent summons an Ally of Justice Catastor in attack mode. He declares his attack on my Lightsworn monster and I activated my My Body as a Shield. Does it negate and destroy Catastor? Please explain. 71.197.120.204 (talk) 03:56, July 20, 2010 (UTC)