You can Ritual Summon this card with "Chaos Form". You can reveal this card in your hand; add 1 "Dark Magician", or 1 non-Ritual Monster that mentions it, from your Deck to your hand, then place 1 card from your hand on top of the Deck. 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 activated effect. You can only use each effect of "Illusion of Chaos" once per turn.
![Illusion of Chaos (Quarter Century Secret Rare) [RA02-EN020] Quarter Century Secret Rare](http://paradoxtcg.com/cdn/shop/files/ygo_placeholder_66a2b824-ef20-48ac-a198-c1ead5546112.png?v=1717717428&width=1445)
