Advanced format ruling
Judgment Dragon
Card effect (current official text)Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by having 4 or more "Lightsworn" monsters with different names in your GY. You can pay 1000 LP; destroy all other cards on the field. Once per turn, during your End Phase: Send the top 4 cards of 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.