Pyrestone Housing

common

Pyrestone Housing is a common artifact in Monster Train 2. Its game-data effect is:

Units get an extra upgrade slot.

“My discovery of the creation of Pyrestones, gemstones infused with flames of the Pyre, was monumental in enhancing the strength of Hell’s forces and marked a turning point in the war against Heaven. That victory was short-lived, however, as the design was stolen and copied shortly thereafter. ”