Advanced format ruling
Darkblaze Dragon
Card effect (current official text)If this card is Special Summoned from the Graveyard: Its ATK and DEF become double its original ATK and DEF. If this card destroys a monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to that monster's original ATK.
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.