The Lone Wanderer,

It's a litrpg with an extremely fleshed out world and magic system.

https://www.royalroad.com/fiction/95097/b5-stubbing-july-21st-the-lone-wanderer-a-world-hopping

There's a link to it's royal road.

Blurb:

"An accidental clone. Talent no one saw coming. Infinite worlds to explore.

Percy was born with little hope of standing out-just another face in a world ruled by bloodlines and class.

Starting with the lowest Red core and mocked as a waste, Percy was always overlooked by his peers and scorned by the powerful. But when his bloodline awakens with the power to send clones across worlds, he seizes the chance to shatter expectations.

Exploring strange realms teeming with danger, Percy returns with priceless treasures: divine techniques, obscure knowledge, and even the seed of a second mana core stolen from an advanced civilization. But the road to the apex is riddled with peril. The elixirs he needs to advance? He'll have to master alchemy to brew them himself. The Great Houses, scheming titans, and invading gods?

They'll do anything to crush him before he can prove that even a so-called waste can reach the stars.

What to expect:

-Weak to strong male MC

-Daily releases

-Fast paced with frequent powerups

-Fantasy setting with magic and a system

-Isekai elements (Percy often possesses random bodies on distant worlds)

-Western cultivation elements (Cleansing mana core to extend lifespan)

-Morally grey MC (Willing to break a few rules but not a scumbag)

-Alchemy

-Runecrafting"