You can only use the (1)st and (2)nd effect of this card’s name each once per turn.
(1) During your opponent’s turn, if this card is in your hand or GY (Quick Effect): You can target 1 “Centurion” monster you control, except “Centur-Ion Emeth VI”; place it face-up in your Spell & Trap Zone as a Continuous Trap, and if you do, Special Summon this card.
(2) During the Main Phase, if this card is treated as a Continuous Trap: You can Special Summon it.