I didn't see you guys post this but, the Gears have their own Attributes, Gold, Silver and Copper. Not only can you activate the Ability on their reference card because you are of the correct Attribute. BUT! You can also activate it if the Gear Attribute is the same as the Gate color. Such as a Gold Gear on a Gold Gate, it would allow you to choose and use any of the 2 Abilities that the reference card has. Correct me if I'm wrong.