Steam Engines

Contraptions allowing the users to direct steam in a certain direction to produce a propulsing force. The steam is either produced via combusting a fuel, or employing the flames wrought by magic in a controlled output. Depending on the inventivity, there are many ways to implement such a technology. So far, nothing groundbreaking has been achieved beyond a few excentric and unique situations. It remains an intriguing but useless idea.

Utility

Costly entertainment and contraptions are most of what the public can come up with.
Extreme cases of its use can be found in warfare when potent mages combine elements to produce dangerous implementations of steam. Not exactly as a technology, but more of a principle. Be it to make the terrain explode via an outburst of steam, or using special gauntlets that turn water into searing hot mist via the user's own abilities.

Access & Availability

Its usage is very limited no matter the region. If there were any major location for their use, they would be the Keratos Empire who try to weaponize most they have on their hands, and the wisemen of Ahurans for whom knowledge must be furthered, even the most mundane and nuinteresting-seeming ones.

Complexity

To hazard a guess, the complexity of the simplest designs are medium at best. Making a ball turn or a door open slowly is the best of what publicly allowed devices can do. The more one tries to complexify it however, the more hurdles stand in the way for no great results.

Discovery

Discovered in multiple places throughout the continent in undetermined times. WHether they were already used in the Old World is anyone's guess for the few documents on the matter seem to indirectly attribute the discoveries to either a First Sent or directly attribute it to a famed scholar of the current world.