Why did some bloodlines and physiques in novels automatically level up?

Tips: 나 혼자만 레벨업 Only I Level Up (Solo Leveling) - Webtoon Season 2 is start from Chapter 132 In this world where Hunters with various magical powers battle monsters from invading the defenceless humanity, Seong Jin-Woo was the weakest of all the Hunters, barely able to make a living. However, a mysterious System grants him the power of the ‘Player’, setting him on a course for an incredible and often times perilous Journey. Follow Sang Jin-Woo as he embarks on an adventure to become an unparalleled existence through his “Level-Up” system - the only one in the entire world! ------ THIS IS AN OFFICIAL LICENSED TRANSLATION FROM D&C MEDIA Copyright Owner's Information: © Chugong 2017 / D&C MEDIA

[You Leveled Up!] [You have learned a new rune.] Arthur Silvera's world just glitched. His mysterious new 'Legacy' is transforming him – a nobody – into the ultimate stat-absorbing, rune-crafting powerhouse. But is this power a gift... or an unmanageable curse? In a world of magic-infused tech, Arthur must master his abilities to survive. Monstrous dungeons, mech-powered guilds, and realms beyond imagining await… but with a Legacy this broken, the whole system might just come crashing down around him. *** Discord Server: https://discord.gg/GFD6p9sByS

A Sky God’s Spiritual Foundation. It was the greatest natural treasure in all of existence, but the sacrifices one must make to gain the approval of such an entity was unimaginable. Ryu is a genius amongst geniuses. He was born with the four Grand Ancestral Bloodlines. The Lightning Qilin. The Fire Dragon. The Ice Phoenix. The Fire Phoenix… He was blessed with an Ancestral Grade Bone Structure and Ancestral Grade Meridians. The Ice Jade Crystal Bones. The Chaotic Silk Meridians… He was bestowed the First Ranked Heavenly Pupils. The Mysteries of Heaven and Earth Pupils… However, none of it mattered. Born with a False Spiritual Foundation, it seemed that all of his talent would go to waste. Unless… Unless he was willing to grasp his Fate in his own hands. ==== **This novel once went by another name 'Rise. Rising. Risen.' So, the wiki is still under this name https://rise-rising-risen.fandom.com/wiki/Ryu_Tatsuya

Our discord server: https://discord.gg/bd9aDdEeQK Without noticing it, a man called Bill passed away, but then he realized that his life wouldn't end that way and soon he was reborn as Billy in another world. Billy was already satisfied enough that he retained his memories, but the surprises didn't end there. He was born with a weird power that granted him the chance to convert mana into experience points and transmit it to all sorts of things. Things were looking pretty good until he noticed that he was born in an impoverished and rustic village that was facing their imminent extinction in the hands of creatures that he had never heard of before and other tribes that had all sorts of abilities. Before he could learn how even to crawl, Billy had to find a way to help his tribe. Otherwise, they will be annihilated before he can even become strong enough to stand. Billy's journey will be much different than he had imagined. Much farther away from Earth than he had originally thought, Billy will have to adapt to a new environment where his tribe is at the bottom of the food chain. Will he be able to grow up safely and try to change things for the better for his new family and friends? The story, all names, characters, and incidents portrayed in this production are fictitious. No identification with actual persons (living or deceased), places, buildings, and products is intended or should be inferred.

A lowly child beggar, a noble prince, a monster viewed as the enemy of the entire world. If you possess all three identities at the same time, which identity would you choose to help you earn a better ending? Thales did not have the answer. He only knew that he came to a different and magnificent world, and he had to face a future that was as difficult to handle as a nightmare. The glorious Empire had already been destroyed for one thousand years, the dying royal family suffered many problems, the legendary sacred battle had plenty of conspiracies, the divided world was in chaos. But Thales had nothing. The only thing he had left was an unswerving determination to preserve his own identity, bravery which would allow him to survive in a perilous situation, and a belief that he would never submit to principles he did not believe. “A King does not gain respect by virtue of his bloodline. The bloodline's glory rests on the deeds of the King.” Darkness will baptize light. Fire will create true steel. The forbidden prince’s story starts here.

As disaster was about to strike, a group of survivors transmigrated into a desolated world and were challenged to a game of survival. From terrifying acid rains, to endless natural disasters, the heavens burn while the earth scorches, radiation is rampant, and nobody is spared from the dangers of this hellscape. The only way one survives is by building a shelter and slowly upgrading it in hopes of surviving another day. Luckily, Su Mo awoke a Doomsday Survival System that allowed him to infinitely level up and upgrade his shelter! The main shelter wooden door can be upgraded into a metal door, which in turn upgrades into a composite gate; the wooden spears can be upgraded into bronze spears, which eventually upgrade all the way into electromagnetic spears... While everyone struggled to survive, Su Mo was fully loaded, and well equipped to dominate the post-apocalyptic world. "While some of us are lighting oil lamps, he's been using refrigerators!" "The walls in his shelter alone are tens of meters thick, it's the safest place on this planet." "Before I die, I wish to spend one day in his shelter..."