Forum:Ally of Justice Catastor vs. Ninja Grandmaster Sasuke

Greetings.

What happens if Ninja Grandmaster Sasuke attacks Ally of Justice Catastor when the latter is in face-up defense mode? Both cards have effects that would destroy the other before the damage step, seemingly (Ninja Grandmaster Sasuke because the attacked card is in face-up defense, Ally of Justice Catastor because monster it is battling is non-DARK). Does one have priority over the other or would they just destroy each other? 01:44, October 21, 2013 (UTC)