Advanced format ruling
Burst Breath
Card effect (current official text)Tribute 1 Dragon-Type monster; destroy all face-up monsters on the field whose DEF is less than or equal to the ATK the Tributed monster had on the field.
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.