Advanced format ruling
Jade Knight
Card effect (current official text)While this card is in Attack Position, Machine-Type monsters you control with 1200 or less ATK cannot be destroyed by Trap effects. When this card is destroyed by battle and sent to the Graveyard: You can add 1 Level 4 LIGHT Machine-Type monster from your Deck to your hand.
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.