Ever Faithful Companions (SBC2-ENS09) - Speed Duel: Battle City Finals 1st Edition

If only your opponent controls a monster, you can Special Summon 1 "Dark Magician" or 1 "Dark Magician Girl" from your hand. Once per Duel, while you control a monster whose original name is "Dark Magician" or "Dark Magician Girl", you can add 1 "Dark Magician" or 1 card that mentions it from your Deck to your hand.