You can only use the effect of “Crystron Quan” once per turn.
(1) During your opponent’s Main or Battle Phase: You can Special Summon 1 non-Tuner monster from your hand, but its effects are negated, and if you Summoned that monster, immediately after this effect resolves, Synchro Summon 1 Machine-Type Synchro Monster using that monster and this card only.