(Multiple heroines) + (System) + (Power fantasy) + (Scheming protagonist) + (A tiny bit of angst)
The assassin Su Chen accidentally uncovered the truth of the universe and transmigrated to the Myriad Worlds. There, he gradually awakened a divine physique and divine power, saw through the darkness of the cultivation world, and used his divine physique to battle the peerless geniuses of countless worlds.
