Libromancer Geek Boy (MP23-EN001) - 25th Anniversary Tin: Dueling Heroes Mega Pack 1st Edition

You can reveal 1 Ritual Monster in your hand: Special Summon this card from your hand. If this card is Special Summoned: You can add 1 "Libromancer" Spell from your Deck to your hand. You can only use each effect of "Libromancer Geek Boy" once per turn.