You can Ritual Summon this card with “Chaos Form”. You can only use this card name’s 1st and 2nd effects each once per turn.
(1) You can reveal this card in your hand; add 1 “Dark Magician” or 1 non-Ritual Monster that specifically lists that card’s name in its text from your Deck to your hand, then place 1 card from your hand on the top of the Deck.
(2) When your opponent activates a monster effect (Quick Effect): You can return this card to the hand, and if you do, Special Summon 1 “Dark Magician” from your GY, and if you do that, negate that effect.