Board Thread:Questions and Answers/@comment-28154750-20160412005155/@comment-11372432-20160412010222

[D-SD03/0001EN：Twin Blade Black Dragon, Zalcandira] Q. If there are four cards in my opponent's drop zone and this card destroys a monster by an attack, can this card get [Double Attack] and stand again? A. Yes, you can. As [Double Attack] activates at the timing after battle, this card will stand by [Double Attack] if there are five or more cards in your opponent's drop zone.

[D-SD03/0015EN：Sickle of Revenge, Avenger] Q. If there are five cards in my opponent's drop zone, if I destroy my opponent's monster in the center, will this card get [Penetrate]? A. No, it will not. This card gets [Penetrate] at he timing when this card attacks, and there are six cards in your opponent's drop zone.

These were taken straight from the official site. Do take note of how timing works in this game, overall.