Advanced format ruling
Gatling Dragon
Card effect (current official text)"Barrel Dragon" + "Blowback Dragon"
Once per turn: You can toss a coin 3 times and destroy as many monsters on the field as possible, but not more than the number of heads.
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.