Crystron Quandax – Battles of Legend: Relentless Revenge (Secret Rare)

1 Tuner + 1+ non-Tuner monsters
Once per Chain, during your opponent’s Main or Battle Phase, you can (Quick Effect): Immediately after this effect resolves, Synchro Summon 1 Synchro Monster, using materials including this card you control. If this Synchro Summoned card is destroyed by battle or card effect: You can target 1 “Crystron” monster in your GY, except a Synchro Monster; Special Summon it.