Advanced format ruling
Delta Crow - Anti Reverse
Card effect (current official text)If you control a "Blackwing" monster: Destroy all face-down Spells and Traps your opponent controls. If you control exactly 3 "Blackwing" monsters, you can activate this card from 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.