Responses
Spoiler!!!!
He inherited rulers authority the moment he was born and later on he will aquire the skill to rise the dead just like jinwoo but here's the fun part, the system made a quest where he will find the reincarnation or vessel of the previous monarchs and make a contract.
He will have his own ability where he can merge to them.

I've read just the first chap, but they will get the same powers? What's fun about this when you already know a lot of his power development