Libromancer Intervention - 25th Anniversary Tin: Dueling Heroes Mega Pack (MP23)

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.