With a new ascension perk called Stellar Manipulation (requires Galactic Wonders, Star Lifters and Fusion Supressors) you can unlock a new megastructure that can be built around any standard star to change it's size, either harvest it for stellar plasma, reducing it's size in the process, or inject plasma to increase it.
Stars can be drained of almost all of their mass, leaving them as a Brown Dwarf, or they can be converted into their volatile, short lived big brother: the Class O Star.




Another mechanic added is Systemcraft assembly, after Lunar Macro-Fabricators and Behemoth Assembly Plants comes the systemcraft printer. Locked behind multiple Acension Perks and techs, the Systemcraft Assembler allows you to construct both regular Systemcraft and Class O Systemcraft in a single stage, assuming you can front the cost. Like other printed celestials, printed systemcraft cost more than their traditionally assembled counterparts but they make up for it with an increase in durability and firepower.




And last but not least is the Class O Systemcraft, which can either be built normally around a Class O Star, or it can be assembled at the aforementioned Systemcraft Assembler. With a reactor 5 times more powerful than that of the regular Systemcraft, the Class O Systemcraft can field over a dozen Existential Pseudo-Erasure Beams with power to spare (also comes with higher base stats, 30 more defensive slots and 3 more aux slots).

Class O Systemcraft are unlocked by possessing the "A celestial Armada" AP, the tech for the systemcraft final stage as well as the "Dyson Sphere Suprainsulation" tech.







The original mod was made by Quollveth and then maintained by Banjomarx, but Quollveth has stopped stellaris modding, as has Banjomarx (at least for the time being) so I decided to update the mod myself, with permission from Quollveth



French: mod_detail.php?publishedfileid=3513691177
Russian: mod_detail.php?publishedfileid=3033118635
Spanish: mod_detail.php?publishedfileid=3537355590
Simplified Chinese: mod_detail.php?publishedfileid=3546946329

If you have any issues, questions or suggestions, contact me in the relevant submod-discussion channel in the Gigastructural Engineering & More discord server