To help with understanding the world and how it works I made this to explain it don't worry there will be little to no spoilers
SKILLS, GENERAL INFO
The world is named earth but is not the earth we know its 15x bigger, covered in more land, and there are magical beasts in this world. People have superpowers called skills when someone hits the age of 16 they go to the tower of god where there are attributes and skills they are given at birth some are unlocked and someone can have a maximum of 5 body skills and 5 magic skills. Skills aren't a set superpower, more usage in battle and everyday use can level them up. Skills will not come with downsides, they are also not unique, let's take fire affinity, for example, 99% of mages with the fire attribute will have the fire affinity skill. Rarity ranks go as follows: (genes do play roles in skills)
Common - Example Fire affinity - Makes fire spells easier to cast
Uncommon - Example stealth - Can make someone's body invisible
Rare - Example flight - Allows the user to fly
Ultra Rare - Example Necromancy - Allows the user to summon the dead
Legendary - ???
Unique -???
The cultivation ranks goes as follows
Tier 1 - Human
Tier 2
Tier 3
Tier 4 - Demi human ranks
Tier 5
Tier 6 - heroic ranks
Tier 7
Tier 8
Tier 9 - God ranks
Tier 10
Tier 11 - ???
Tier 12 - ???
Each tier has 3 sub ranks: Low, Mid, Peak (same ranks apply to magic beasts)
CULTIVATION, SOUL WEPONS
How people cultivate in this world is game-like, killing opponents grants XP, XP grants levels, and levels grant stat points (Every living thing has a system) every 2 Tiers of cultivation grants the user the chance to evolve. Evolutions are based on the user's actions in that tier. The user also has the opportunity to swap out a skill or evolve an existing one. Magical beasts evolve every Tier and can also evolve and swap skills.
Soul weapons: When killing a beast they can drop souls, these souls can be crafted into weapons with special abilities. Unfortunately, these souls do not drop very often with the chances of them dropping once every 100 beasts. People can also reconstruct a monster from the soul making it their pet. They can also absorb souls granting beast-like body parts like stone skin or wings. There need to be physical materials though you can't just slap some souls tougher and make a sword, you will need beast parts or rare ores to be the base of the weapon/armor.
The rest will be unveiled as the story continues.