Anime: I Want Harem - Chapter 52

“Six-legged black, red worm, level seven elite worm beast. After absorbing it, I should be able to reach the eighth level.”The Giant Exploding Thunder Dragon beast, with bronze blood, is as big as an asteroid. If I absorb it, I can reach the black hole level immediately!Chaos White Liexiang, the best of chaotic spirit beasts. Difficult to take care of, but as long as I absorb it, my life index can break 10000!Wang Xu accidentally got a flame that could devour insects and beasts and convert their energy into his own. From then on, no one could stand in his way!

After Reincarnating into Naruto World at the Warring State Era as an Uzumaki, Masahiko thought that he got a useless System. He lived for 48 years as a normal, below average Uzumaki Shinobi.

That changed when he finally knew how the system works the day of his 49th Birthday!

- Description from Novelupdates

Betrayed by his beloved queen.Stabbed by the very men he raised to power.King Alaric died with a broken heart… and a blade in his chest.Fate’s twisted joke?He’s reborn—in chains.Collared. Beaten. Sold like cattle.Once a mighty ruler. Now a slave in a world of magic, monsters, and bastards with crowns.His new master? Arrogant with even little much money, and the personality of a wet cabbage.And the wife?Let’s just say... she deserves better. Much better.Just when he thought a future of licking boots and scrubbing chamber pots—[DING! You have awakened the Domination System.]Rule the strong. Break the proud. Tap the wife. Steal the life.“I—wait, what?”[New Quest: Subjugate your Master's Wife.][Reward: +500 Power | Domination Skill Unlocked – Command Voice][Bonus: Do it on the master’s bed for extra EXP.]He grins through the pain, eyes burning with ambition.They thought they broke him?They just gave him a reason to rise.Power. Revenge. Pleasure.He’ll take it all.------------------Note- No ntr, no yuri.Mc won't abandon his women, neither he will force them, and not every women will be subjugated.And System isn't all about subjugating others wives, it's just one of it's features...

This novel is also known as Gu Daoist Master

Humans are clever in tens of thousands of ways, Gu are the true refined essences of Heaven and Earth.

The Three Temples are unrighteous, the demon is reborn.

Former days are but an old dream, an identical name is made anew.

A story of a time traveler who keeps on being reborn.

A unique world that grows, cultivates, and uses Gu.

The Spring and Autumn Cicada, the Venomous Moonlight Gu, the Wine Insect, All-Encompassing Golden Light Insect, Slender Black Hair Gu, Gu of Hope…

And a great demon of the world that does exactly as his heart pleases!

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*Gu (蛊) referred to poisonous insects in various cultures in South China while in folklore Gu spirits could transform into all kinds of species.

- Description from Novelupdates