Forum:Super Polymerization vs. Face-down monsters

I'm pretty sure that when you activate Super Polymerization you're supposed to select/declare whatever you're Fusion Summoning right? So, a player with a HERO deck that had one each of the HEROs that need a HERO and a monster of the appropriate attribute (i.e. Elemental HERO Great Tornado, Elemental HERO Absolute Zero, Elemental HERO The Shining, etc. could not use an opponent's face-down monster as fusion material right?

The player would need to know if the monster is the proper attribute in order to use it right? So I can't just summon a HERO and use Super Poly on my opponent's face-down and get whatever Elemental HERO I want correct?

But, what if I knew what the face-down was thanks to a card like Mind Haxorz or Acid Trap Hole? Could I use Super Poly on that face-down monster (under my opponent's control)?--Joejaboy (talk • contribs) 07:12, October 26, 2011 (UTC)