Upon reaching 50, 75 and 100 skills, you get a perk in the form of a passive and active ability.
Passive abilities you can see in the table.
Active abilities are various combat techniques (for weapons and armor skills), super spells (for magic skills), persuasion techniques, and others.

Classes

For every 10 levels you get 1 Legendary Point
For every 50 reputation you get 1 Legendary Point
For the victory over Dagoth Ur you get 3 Legendary Points
For the completion of the Tribunal, the Blood Moon, any Great House, any Guild, the Imperial Legion, the Temple of the Tribunal or Morag Tong - you get 1 Legendary Point
When you receive 2 Legendary Points, you can choose 1 Tier Class
Upon you receive 5 Legendary Points, you can choose Tier 2 Class
Upon you receive 10 Legendary Points, you can choose Tier 3 Class
See the class inheritance scheme as well as the table with class bonuses:

1: Fighter
2: Mage
3: Thief
4: Warrior
5: Battle mage
6: Sorcerer
7: Agent
8: Dodger
9: Scout
10: Warlord
11: Paladin
12: Spellsword
13: Shaman
14: Archmage
15: Magician
16: Night blade
17: Trickster
18: Assassin
19: Rogue
20: Duelist
21: Barbarian
22: Hero
23: Seeker
24: Wanderer

Health is recounted when loading save if the hero is not injured and the effect of increasing health is not affected by it.
Maximum Health = Endurance / 2 + Willpower / 4 + Strength / 4 + Perk Bonus + Class Bonus


Have a  question? - find me on this channel:
https://discord.gg/SyEu99S
@Axemagister
 
You may also be interested in my other gameplay mods:
 
4NM_COMBAT
Advanced combat system. Features for each weapon, combatstances, critical hits, injuries, active dodges.
 
4NM_MAGIC
Advanced magic system. The dynamic power of all magic. Non-linear damage formulas. Secondary effects fromdifferent types of damage. Many new effects.
 
4NM_RANDOMIZER
Stats ofcreatures are set at 80-120% of the norm.
 
4NM_GMST
Health,depending on the player’s stats,and GMST rebalancing for much better gameplay.
 
4NM_Training
Realistic learning system. Non-linear formulas for gainingexperience for combat and magic skills. Optional: 5 skill points per level and
new leveling mechanics.
 
4NM_Armorer
Ability to improve the condition of weapons above the norm(improved weapons temporarily do more damage).
 
AntiWitcher
Realism in drinking potions.
 
DragonDoor
Enemieschase you through the doors.
 
HardTrade
Eliminates trade exploits.
 
HardSave
You can notsave the game in battle.
 
4NM-MOD
Глобальный ребаланс всей игры и улучшение всех аспектовгеймплея. Пока только на русском языке.