Advanced format ruling
Castle Gate
Card effect (current official text)This card cannot be destroyed by battle. Once per turn, if this card is in face-up Attack Position, you can Tribute 1 Level 5 or lower monster to inflict damage to your opponent equal to that monster's original ATK.
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.