Tengu 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).
Rulings
- You can activate this effect at any time, except during the Damage Step, Main Phase 2, or the End Phase.
- If you activate this in response to an Attack, or during the Battle Step when a monster is attacking, that current attack is negated.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.