You can only use each of the [1] [2] effects of this card once per turn.
[1] During either Main Phase, while this card is in your hand (Quick Effect): You can target 1 Fiend monster or Set card you control; Destroy it, and if you do, Special Summon this card, but while it is face-up in the Monster Zone, you cannot Special Summon monsters, except Fiend monsters.
[2] If this card is sent to the GY: You can can Set 1 "Unchained" Spell/Trap directly from your Deck.