You can only use each effect of "Merlin" once per turn. •You can Tribute this card, Special Summon 1 "Noble Knight" monster from your Deck. You cannot Special Summon monsters the turn you activate this effect, except "Noble Knight" monsters. •During either player's turn: You can banish this card from your Graveyard, immediately after this effect resolves, Synchro Summon 1 "Noble Knight" Synchro Monster using monsters you control. •During either player's turn: You can banish this card from your Graveyard, immediately after this effect resolves, Xyz Summon 1 "Noble Knight" Xyz Monster using monsters you control.