You can only use the 1st and 2nd effects of this card’s name once per turn.
(1) During start of the Damage Step in which your opponent’s monster attacked: You can send this card you control or in your hand to the GY, then target 1 Level 8 Fiend monster in your GY; Special Summon that monster, but its effects are negated, and switch the attack target to that monster and proceed to damage calculation.
(2) If a Level 8 Fiend monster is sent to your GY while this card is in the GY: You can add this card to your hand.