Advanced format ruling
Ghost Gardna
Card effect (current official text)When a face-up monster you control is selected as an attack target, you can change the target to this card. When this card is destroyed and sent to the Graveyard, 1 face-up monster your opponent controls loses 1000 ATK, until the End Phase.
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.