You can only use the 1st and 2nd effect of this card’s name each once per turn.
(1) During the Main Phase, if this card is in your hand (Quick Effect): You can target 1 Fiend monster or 1 Set card you control; destroy it, and if you do, Special Summon this card, and if you do that, you cannot Special Summon monsters while it is face-up in the Monster Zone, except Fiend monsters.
(2) If this card is sent to the GY: You can Set 1 “Unchained” Spell/Trap directly from your Deck.