Preface

This style of fighting invites foes to hit on the user and give them wounds and fill them with adrenaline until the user can harness this rage and use it to increase their combat capability.

When the user hit a certain percentage of health, their body will slightly glow red as they enter the berserk mode. This gives them a lot of physical prowess from rage and adrenaline. However, the user takes an extra 20% damage when they are hit in this mode because they become reckless.

Increment in the mastery will increase the berserk threshold, increase pain tolerance. Keep in mind that going in and out of berserk cost 15% energy, so regulate healing carefully to not trigger berserk multiple times.

Passive Mechanics

Increased Action Speed	Adrenaline helps with getting the body to perform faster. This does not apply to movement speed. This feature works on spellcasting and other actions.
Increased Attack Damage	Attacks become sloppy but hit very hard, leading to more damage.
Pain Tolerance	Endure a lot of pain and replace it with a numb, albeit hot sensation.
Battle Focus	Gives you more control over your character in very stressful and distracting situations. This is on top of the control you get from realistic pain setting. This feature increases spellcasting concentration as well.

Progression

0-29 Beginner	Your body feels tingly when you take a lot of damage. Berserk below 10% HP. Reduce pain by 10%.
30-99 Novice	Your body is adapting to pain and rage, but you are still very unskilled with the berserk state. Berserk below 20% HP. Reduce pain by 20%. Increase action speed by 10%. +2 in quick event.
100-199 Trained	You explode with rage, seemingly to forgetting to fight like you had trained and simply swing your weapons around like a madman. Berserk below 30% HP. Reduce pain by 30%. Increase action speed by 15%. +4 in quick event.
200-499 Proficient	You are giving in to the fury that courses through your blood as your health drops. Your fighting is more adapted for the berserked state now. Berserk below 40% HP. Reduce pain by 40%. Increase action speed by 20%. +6 in quick event.
500-999 Adept	You can do everything above, but better, your focus is sharpening. Berserk below 50% HP. Reduce pain by 50%. Increase action speed by 25%. +8 in quick event.
1000-1499 Expert	You Have become quite a demon on the battlefield at this point. Your focus in battle is over-riding the pure rage. Berserk below 70% HP. Reduce pain by 70%. Increase action speed by 35%. +12 in quick event.
1500 Mastered	Instead of pure rage, you can maintain a murderously calm mindset as you butcher your enemy, ignoring their attacks and the pain of damage dealt to you. You are a focused killing machine. Berserk below 80% HP. Feel no pain. Increase action speed by 50%. +16 in quick event.