Advanced format ruling
Necro Gardna
Card effect (current official text)During your opponent's turn: You can banish this card from your Graveyard; negate the next attack this turn from a monster your opponent controls (this is a Quick Effect).
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.