You can only use this card name’s 1st and 2nd effects each once per turn.
(1) You can send 1 Spellcaster monster or 1 Spell/Trap that specifically lists the card “Dark Magician” in its text from your hand or face-up field to the GY; Special Summon this card from your hand.
(2) During your Main Phase: You can Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from your hand or field as Fusion Material, including at least 1 Spellcaster monster.