Dark Spirit of Banishment

If your opponent’s monster attacks, at the start of the Damage Step: You can send this card from your hand or field to the GY, then target 1 Level 8 Fiend monster in your GY; Special Summon it, but its effects are negated, and if you do, change the attack target to it and perform damage calculation. If a Level 8 Fiend monster(s) is sent to your GY while this card is in your GY (except during the Damage Step): You can add this card to your hand. You can only use each effect of “Dark Spirit of Banishment” once per turn.