Advanced format ruling
Light of Intervention
Card effect (current official text)While this card is on the field, Monster Cards cannot be Set or flipped face-down. If a Monster Card would be Set, it must be Normal Summoned in face-up Defense Position.
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.