If “Necrovalley” is on the field: You can Fusion Summon 1 Spellcaster Fusion Monster from your Extra Deck using monsters from your hand and/or field as material, including this card. You can only use this effect of “Gravekeeper's Spiritualist” once per turn.
![Gravekeeper's Spiritualist (SOFU-EN013) [Soul Fusion]](http://fafnirshoard.ca/cdn/shop/files/177975_1ecc2e61-1f4e-47f8-a7a3-68636518e7c4.jpg?v=1782705840&width=1445)