In Emma, their names are "Imud Hubrau" or "beasts of heaven". In Galent's language, it is called Soltueurs, or "sunshine killer". These behemoths have a well-known name, Titan, the largest spaceship ever built. Pure financial resources, manpower and time costs, coupled with the necessary technical knowledge, building a Titan-class spacecraft is very risky, and only those big empires dare to bear it. Some spaceships even take decades to assemble. Many Titan-class spacecraft have been in service for more than a century. The history of the first Titan-class spacecraft, Jupiter's three motherships, can be traced back to the early days of modern space flight. They are constantly being repaired and improved, but even during the maintenance period, there must be a spaceship on duty.

The value of Titan-class spacecraft is unparalleled. Titan-class spacecraft are used as mobile bases and flagships for military operations. Just relying on their appearance can turn the tide. In addition to their sophisticated equipment and armor several meters thick, the most striking thing is that its hull can carry an entire fleet across the entire galaxy. Bow gravitational waves generated by their unimaginable mass can even attract those small spacecraft. Some Titan-class spacecraft are so massive that they can even change the tidal phenomena of the planet. The most famous event is that when Galent's Titan-class spacecraft flew to the near-earth orbit of a small agricultural planet Gaulard, it suddenly caused a drastic tidal change and flooded all the vilen and farmland. The sharp drop in grain production means that the entire galaxy that relies on Gorard to provide food has to rely on grain merchants, otherwise it will face serious famine. From then on, Titan must make a safe and reliable plan to prevent them from getting too close to a planet.

In recent years, building Titan-class spacecraft is no longer the privilege of the richest empire. With the development of Ad Astra, people have discovered many resource-rich worlds. In order to build a powerful fleet, Emma Corps chose a satellite with rich resources and hot climate as their primary source of resources. After decades of crazy exploitation, the satellite surface strata have been completely destroyed. At the cost of the lives of tens of thousands of Mimatar slaves, this Titan-class spacecraft was finally completed, but this satellite has become a desolate hell with geological disasters from time to time.