For each level-up of your hero, you gain one skillpoint. You can choose to upgrade a skill depending on previously used skillpoints:
1 - 4
Toughness: +2% HP per level
Shield Proficiency: +1 Armor and -0.1 second stun duration per level
5 - 9
Alchemy Lore: +5% potion effect per level
Axe Proficiency: +1% chance to deal double damage with axes per level
Blunt Weapon Proficiency: +1% stun chance with blunt weapons per level (Stun duration 2 Seconds)
Sword Proficiency: +1% chance to deal additional 40% damage with swords (depending on your health) per leve
10 - ?
Resolution: +100 max. Mana per level
Bloodlust: +1% chance of Mana Leech per attack and +1 Mana Regeneration per Level (Successful Mana Leech gains 10 Mana)
