Forum:Help with this case scenario

Can someone help me with this case?

Let's say Player A controls a Ice Beast Zerofyne and a Armades, Keeper of Boundaries while player B controls a Yubel and a face down Compulsory Evacuation Device. Case A) During player A's Main Phase he activates Zerofyne effect, negating Yubel effect. Then he decides to attack with Armades. After Yubel is destroyed by Armades does player B can summon Yubel - Terror Incarnate? Case B) Also during player A's Standby Phase, player B uses Compulsory Evacuation Device to send Zerofyne to the Extra Deck. Then Player A decides to attack Yubel with Armades. Does Yubel effects activates or what?--Juan Ma (talk • contribs) 00:41, September 24, 2013 (UTC)