Advanced format ruling
Dark Grepher
Card effect (current official text)You can Special Summon this card (from your hand) by discarding 1 Level 5 or higher DARK monster. Once per turn: You can discard 1 DARK monster; send 1 DARK monster from your Deck to the GY.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.