You can only Special Summon with the 1st effect of this card’s name once per turn. You can only use the 2nd effect of this card’s name once per turn.
(1) If there is a Level 5 or higher DARK monster on the field, you can Special Summon this card (from your hand).
(2) If this card is sent to the GY: You can add 1 Spell/Trap that mentions “Red Dragon Archfiend” from your Deck to your hand.