Changes
→What if there are no tuners?
*is like that...[[Substitoad]] and [[Dupe Frog]] are on the field. [[Lightning Vortex]]...,[[Book of Moon]] chains for [[Substitoad]]. If you have [[Stardust Dragon]] and [[Formula Synchron]], and your opponent attacks...there is a kind of chain,you are allow to summon [[Shooting Star Dragon]].So your opponent is allow to attack again.That is what i think.
(in your opponent's turn)
*^^^I disagree, since Formula Synchron only allows you to Synchro summon during the opponent's Main Phase, not battle phase.
