In the Second Generation of the Trench, He Changed To the Ruanfan Script - Chapter 44:

A slime randomly falls into existence. Sapient and born with the ability to recreate parts of the things it preys upon, the highly confused drop of primordial soup decides that the only real thing it can do is become the being at the top of the food chain. A task of longevity in the leaves of the Omniverse.

[Warning! The MC here is the literal incarnation of evil and madness throughout the story.]Valtar Titanblood formerly known as Ethan Martin on Earth was struck by an unimaginable tragedy and took his own life at the end, his whole life filled with misery and incompetence of his own doing.Then he transmigrates to a world of infinite proportions and power that defies logic, this new world which is filled with Dragons, Titans, Ouroboros, and countless more bloodline creatures and mythical beings, also powerful humans who are known as Mystic roams here as well.Valtar in this new world has the Karma System and the bloodline of an unknown titan running through his veins, with these powers in hand he who was supposed to become the symbol of justice and equality decided to become the paragon of madness and evil.He who had the tools to become the Judge of Truth and the figure of Respect chose to become the arbiter of chaos and the embodiment of fear.

[Beast Mastery][Summoning][Pets][Evolution][Development]Demon, Savage, Nether, Damnation, Mechanism, Soldier, Medicine, Abnormal, Witch, Immortal, Ferocious...This world is a world of monsters, filled with countless diverse “Fond Spirits”.But in this world, humans also wield the power of “occupation classes”. Once awakened, they can have Contract Imprints, allowing them to form contracts with the monsters, creating entirely new bonds.[For Instance]♦F-level Occupation Class “Manicurist”- helps the Fond Spirits trim their claws, making them beautiful, or sharper.♦E-level Occupation Class “Hunter”- marks and chases, closely collaborating with the Fond Spirits, the most classic hunting occupation class.♦C-level Occupation Class “Puppeteer”- manipulates Fond Spirits at crucial moments, making their strikes more precise and powerful.♦B-level Occupation Class “Midwife”- assists pregnant Fond Spirits with health checkups, giving random blessing effects to the newborns.♦B-level Occupation Class “Mechanic”- under the right conditions, modifies the Fond Spirits, turning them into semi-mechanical beings.♦A-level Occupation Class “Dragon Knight”- rides dragon-type Fond Spirits into battle. Man and dragon unite, becoming invincible.♦S-level Occupation Class “Arch Warlock”- intensifies the elemental properties of Contracted Fond Spirits and seals their skills in advance to execute forbidden spells for the second time....♦C-level Occupation Class “Fitness Trainer”...♦D-level Occupation Class “Flame Thief”...♦A-level Occupation Class “Mysterious Merchant”...♦B-level Occupation Class “Gourmet”...♦Special Occupation Class “Brave”......(I already have a completed work of 3 million characters titled “Master of Pets”. “The Rising of the Fond Spirits” is my second work, a Beast Mastery tale with entirely original settings, you're welcome to try it out!)

An ordinary medical student suddenly got the blessing of the system and could directly see the patient’s health! Since then, treating illnesses and saving lives has become commonplace, and he has also become a legend in the medical field.

- Description from novelbuddy