Edison format ruling
Grave of the Super Ancient Organism
Card effect (current official text)All Level 6 or higher Special Summoned monsters on the field cannot declare attacks or activate their effects.
Rulings
All face-up Level 6 or higher Special Summoned monsters on the field cannot declare an attack or activate their effects.
- Even mandatory effects cannot activate while "Grave of the Super Ancient Organism" is active.
- This card does not negate effects, it prevents both players from activating such effects.
- If a monster’s Level is lowered below 6, it is no longer affected.
- Level 6+ Monsters Special Summoned before this card resolves are affected.
- If a monster's effect was activated, and this card was chained, that effect still resolves.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.