Dynasty Creation

The summary is quite long so I'll just say before you read it (or not) that the MC is reincarnated in another world as the descendant of a stupid god but the problem : he has nearly no cheat so he'll need to play time and not rush like MC of other novel. He will create a dynasty and will guide them to build the strongest dynasty in order for him to become a god and for the one who summoned him to recover his power and avenge himself. The hero is reincarnated in another world. He was called there by the ancestor of his new body. An ancient god who has lost the majority of his powers and who wishes to regain them by creating a powerful dynasty. The problem is that his only descendant, who should have been a demigod or at least a super powerful being, only has one ability : the ability to create magical objects by sacrificing his own life force. This seems pretty useless for creating a powerful dynasty. On top of that, the god's heir dies, which forces the latter to call a compatible spirit to put it in the body of his descendant in order for his legacy to subsist. This is where our protagonist arrives. A young man who has three hobbies in life: reading, watching anime and playing strategy games. He then wakes up in his new body, signs a contract with the god, his new ancestor and sets off on a quest to become more powerful, obtain an estate and have talented children. This seems complicated once again because of quite a few resons : his body is weak and he appeared in a world constantly at war, even if he's the last descendant of a god, this god never paid attention to them so his family is now a farmer family and his parents died years ago and even more : he doesn't know anything about this world... He will use the power of his predecessor to create an object capable of containing his consciousness when he realizes that time is passing and that unlike the heroes of the novels he does not have a cheat code that allows him to create a powerful kingdom of himself : When he reaches a certain age and realizes that his body is damaged, he creates a ring which will allow him to shelter his spirit while having the potential to become more powerful. Each time the wearer of the ring kills an enemy, the ring sucks the life force from them in order to strengthen itself and allow the ring's master (him) to add functionality to it. Watch as he spend his time growing the power of his dynasty in order to accomplish his goal. The protagonist will first have a human appearance and then will just be the spirit of the ring, a legacy he bestowed upon his descendants. He will then communicate and guide them to survive and become stronger.