Forum:Synchro Summon/Xyz Summon Chain

Ok so I was dueling a player and he used Thunder End Dragon's xyz effect which allows him to destroy all monsters on the field but he also synchro summoned Azure-Eyes sliver dragon, I asked him how he was able to do that he told me he chains the synchro summon the monsters he had to summon azure but those monsters were being destroyed by Thunder end dragon's effect. Are you able to do this he told me he chains the synchro summon. so for example i destroy all monsters i have one he has three, but he "chains" a synchro summon so his sychro monster isnt destroyed, would it be too late or is it allowed? KillerElite-117 (talk • contribs) 05:31, February 28, 2015 (UTC)