Advanced format ruling
Stygian Sergeants
Card effect (current official text)1 Fiend-Type Tuner + 1 or more non-Tuner monsters
When this card destroys an opponent's monster by battle and sends it to the Graveyard: You can have this card gain 800 ATK until the end of the Battle Phase, also this card can make a second attack in a row.
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.