McCullough, Joseph A. Frostgrave. Fireheart

In the glory days of Ancient Felstad, artisans competed to produce the most beautiful, the most functional, and the most enduring constructs. These living works of art could be seen everywhere in the city, fulfilling many of the day-to-day tasks that kept the magical metropolis running. They provided transportation and security, worked on construction and cleaning, exterminated vermin, butchered animals, and tended furnaces. Then came the cataclysm. The ice and snow not only buried and destroyed most of the constructs active in the city, but nearly wiped out the knowledge of their creation. Certainly, the constructs animated by the explorers of the Frozen City are crude in both form and function compared to what once existed.
This supplement for "Frostgrave. Fantasy Wargames in the Frozen City" provides a study of constructs, offering expanded rules for their creation, modification, and even re-animation. It examines enchanters' workshops, detailing new magic items and base modifications that aid in the animation process, and also includes a bestiary full of new constructs. Of course, much of the knowledge that was once lost still exists in the frozen ruins, so the book also features several scenarios set in the once-great factories where the art of construct creation reached its pinnacle.

The machines created by the explorers of the Frozen City are crude in both form and function compared to what once existed.
This supplement to "Frostgrave. Fantasy Wargames in the Frozen City" looks at machines and provides expanded rules for their creation, modification and even resurrection. It explores the workshops of enchanters, describes new magic items and base modifications that aid the revitalisation process, and also includes a bestiary full of new constructs. Of course, much of the knowledge that was once lost still exists in the frozen ruins, and so the book also contains several scenarios set in the once great factories where the art of machine creation reached its peak.