Guardian Elma (DR1-EN167) - Dark Revelation Volume 1 Unlimited

This card can only be Normal Summoned, Flip Summoned, or Special Summoned when there is a Butterfly Dagger - Elma on your side of the field. When this card is Summoned successfully, you can select 1 appropriate Equip Spell Card in your Graveyard and equip it to this card.