When your opponent activates a card or effect: Target 1 "Libromancer" Ritual Monster you control; return it to the hand, and if you do, negate that activated effect, then you can Special Summon 1 "Libromancer" monster from your hand or GY. You can only activate 1 "Libromancer Intervention" per turn.
![Libromancer Intervention [MP23-EN049] Common](http://www.dungeonsandjavas.com/cdn/shop/products/cd988276-fd21-5b69-b4b6-5dffc3a1b9e8_a6771bdc-5c30-413a-88f9-36e420a894b5.png?v=1696606317&width=1445)
