Forum:Xyz Materials attachment

I have a question regarding Xyz materials. When attempting to summon an Xyz monster and you have the units on the field, would they be considered attached to the monster before it's even summoned? Otherwise I believe Xyz materials would stay on the field unless the monster was successfully summoned. For example, you overlay 2 rank 4's for Number 39: Utopia, but the summon gets negated, why is it considered that the materials get sent to the graveyard if they haven't been attached to Xyz monster yet. If it were a cost to overlay and the Xyz monster gets negated than the materials weren't ever really in the Xyz zone and as such monsters like Reborn Tengu and Sangan would get their effects. However if they are being attached to the Xyz material before it's summoned it would makes sense that they would leave with the Xyz monster if its summon is negated. The main thing I would like to know is, "Whether or not Xyz materials are a cost to summon", and "Are the materials attached to the Xyz monster before it's summoned". I'd like to know this information for future use, please and thank you. 70.162.221.194 (talk) 08:55, January 23, 2012 (UTC)