Advanced format ruling
Ancient Gear Golem
Card effect (current official text)Cannot be Special Summoned. If this card attacks, your opponent cannot activate any Spell/Trap Cards until the end of the Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage.
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.