Elemental Fusion Engine!
On the surface, it appears to be an indispensable energy source for crafting Legendary Constructs.
But Matthew had far greater expectations for it.
After all, the Elemental Fusion Engine encompasses a variety of technologies and holds immense potential for broader applications.
The Elemental Fusion technology, which Matthew coveted the most, was even more appealing to him than the Nesserite Empire's Mysicala Core.
After all, the application and calibration of the Mysicala Core were deeply bound to the Material Plane.
Furthermore, its cost was exorbitant; even if the Bay Territory exerted all its efforts, it couldn't produce a single Mysicala Core in a year.
Thus, Matthew naturally decided to settle for the next best option: choosing the more adaptable and forward-looking Elemental Fusion technology.
