Advanced format ruling
Brain Golem
Card effect (current official text)Effects of face-up LIGHT monsters are negated. If this card destroys a LIGHT monster by battle, it can attack once again 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.