You can only use the (1)st and (2)nd effects of this card’s name each once per turn.
(1) When your opponent activates a monster effect as Chain Link 2 or higher (Quick Effect): You can make that effect become “Your opponent places 1 “Centur-Ion” monster from their face-up field or GY face-up in their Spell & Trap Zone as a Continuous Trap”, also you cannot Special Summon “Centur-Ion Chimerea” for the rest of this turn.
(2) During the Main Phase, if this card is a Continuous Trap: You can Special Summon it.