Clockwork soldier
The Clockwork Soldiers were giant, clockwork robots that appeared as toy soldiers and were used as patrols in the Land of Fiction. The Soldiers are slow and clanky, but deadly and menacing. The light on top of their hats is used as a camera for the Master of the Land to see from his base, but may not be how the Soldiers themselves see. They lumber around with rifles that end with sharp bayonets.
Their exact origin is unclear, if they were created by the Master of the Land or the Master Brain; also, if they work with the White Robots, which serve as guards, or if they are simply a different manifestation of the robots, since they don't appear together at any time. Since no characters of the Land could see the Soldiers, they may have been created specifically to locate and capture the Second Doctor and Jamie and Zoe when they arrived in the Land, and may not be residents of the Land.