Advanced format ruling
Blade Knight
Card effect (current official text)Gains 400 ATK while you have 1 or less cards in your hand. If you control no other monsters, the effects of Flip monsters destroyed by battle with this card are negated.
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.