You can target 1 card you control; destroy it, then you can destroy 1 Spell/Trap on the field. If this card is in your GY: You can target 1 Fiend monster or 1 face-down card you control; destroy it, and if you do, Special Summon this card, but place it on the bottom of the Deck when it leaves the field. You can only use each effect of "Unchained Soul of Shyama" once per turn.
