Advanced format ruling
Doomsday Horror
Card effect (current official text)This card's ATK and DEF are equal to the number of banished DARK monsters x 300. If this card is destroyed and sent to the Graveyard: Return all banished DARK monsters to the Graveyards.
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.