Empire of Man: This AI Is Going to Light up the Stars

In the 27th century, the empire established by mankind is busy conquering space. They discovered an ancient ruins belonging to an unknown civilization on an originally inconspicuous border planet. There is a "spire" underground, with a "sarcophagus" buried underneath, containing "fire". Before humans understood the principles of those things, they first saw their potential for weaponization. The Empire built on this foundation with its anti-planetary weapons program. But life is designed to resist. Defected AI, exiles, soldiers, natives... They come from different time and space, different positions, and different camps. They come from outcast gangs, resistance groups, independent republics and even within the empire. There are contradictions and conflicts between them, and they can cooperate or betray. They hold fire in their hands to light up the stars. Note: Multiple characters include non-human characters.