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 [BACH-EN091] Super Rare](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/17c721e1-fe4f-5144-bffb-6a3d5b507ce1.jpg?v=1698527933&width=1445)