Advanced format ruling
King Dragun
Card effect (current official text)"Lord of D." + "Divine Dragon Ragnarok"
Your opponent cannot target Dragon monsters with card effects. Once per turn: You can Special Summon 1 Dragon monster from your hand.
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.