During the Main Phase, if this card is in your hand (Quick Effect): You can target 1 "Mannadium" monster you control or 1 monster you control with 1500 ATK/2100 DEF; destroy it, and if you do, Special Summon this card. If this card is Normal or Special Summoned: You can add 1 "Mannadium" card from your Deck to your hand, except "Mannadium Riumheart". You can only use each effect of "Mannadium Riumheart" once per turn.
![Mannadium Riumheart [MP24-EN079] Prismatic Secret Rare](http://www.brainwashcards.com/cdn/shop/files/ygo_placeholder_6fe605df-6076-45f0-bbb0-087ed793a6ff.png?v=1726766585&width=1445)
![Mannadium Riumheart [MP24-EN079] Prismatic Secret Rare](http://www.brainwashcards.com/cdn/shop/files/579553.jpg?v=1727889986&width=1445)
![Mannadium Riumheart [MP24-EN079] Prismatic Secret Rare](http://www.brainwashcards.com/cdn/shop/files/579553_fd0aa117-bba3-4003-ba08-d93a6ed9e0ef.jpg?v=1728086054&width=1445)
![Mannadium Riumheart [MP24-EN079] Prismatic Secret Rare](http://www.brainwashcards.com/cdn/shop/files/579553_c6f52b2c-a606-4ba3-a152-e6dbcfd67094.jpg?v=1728492081&width=1445)