During your opponent's turn, if this card is in your hand or GY (Quick Effect): You can target 1 "Centur-Ion" monster you control, except "Centur-Ion Emeth VI"; place it in your Spell & Trap Zone as a face-up Continuous Trap, and if you do, Special Summon this card, also you cannot Special Summon "Centur-Ion Emeth VI" for the rest of this turn. During the Main Phase, if this card is a Continuous Trap: You can Special Summon this card. You can only use each effect of "Centur-Ion Emeth VI" once per turn.