Barian Battlemorph! Twin Destinies

You can only use this Skill's first effect once per turn. 1: Can be activated during your Main Phase. Barian Battlemorph! Regain your true form! You can play 1 "Number 103: Ragnazero" or "Ice Beast Zerofyne" (each card can only be played once per Duel) in face-down Defense Position from your Extra Deck (its battle position can be changed) and attach 2 "Blizzard Thunderbird" from outside your Deck to that monster as Xyz Material, also until the end of your opponent's turn, monsters your opponent control loses 100 ATK.