Advanced format ruling
Swords of Concealing Light
Card effect (current official text)Destroy this card during your 2nd Standby Phase after activation. When this card resolves, change all monsters your opponent controls to face-down Defense Position. Monsters your opponent controls cannot change their battle positions.
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.