Forum:Smokescreening. Legal or not?

Ok, so there has been a pretty big argument at my locals. About half of us think that smokescreening from one deck to another (I.E. running Machina, then siding out the Machina engine and putting in a Hero Stun Variant by siding 15 cards in, 15 out.) is completely fair and tournament legal, the other half don't. So I come here asking for answers from someone who might know more about this than an argumentative group of guys (and a few girls) in a hobby shop. So, Smokesceening. Legal, or no?  CardGamesFTW (talk • contribs) 02:54, March 29, 2011 (UTC)