Forum:SS'ing an Aesir during End Phase if it was destroyed while face-down

There's a ruling that says that Aesir cards cannot be SS'ed at the End Phase if they were destroyed by battle while face-down. Why is that? It was my understanding that a monster is flipped face-up during the Damage Step. Am I missing something?

Thanks! Karasuhebi (talk • contribs) 04:28, January 13, 2014 (UTC)