Advanced format ruling
Garlandolf, King of Destruction
Card effect (current official text)This card can only be Ritual Summoned with the Ritual Spell Card, "Ritual of Destruction". When this card is Ritual Summoned, destroy all other face-up monsters on the field with DEF less than or equal to this card's ATK. This card gains 100 ATK for each monster destroyed by this effect.
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.