Berserker, Mad Warrior, is one of the seven normal Servant classes summoned for the Holy Grail War. Servants placed within this class are always Heroic Spirits who have gone berserk during battle at least once in their lifetime. This trait allows them to use the special ability Mad Enhancement, which trades their consciousness and sanity for a large power boost. This class is usually for magi who have summoned Heroic Spirits with insufficient abilities and attributes, allowing them to strengthen their Servants to make up for their lower attributes and compete against stronger opponents. While it is ideal for Servants to reach the level of the Heroic Spirit, the class allows for their attributes to surpass even the original. If used on an already strong Heroic Spirit, such as Heracles, they will become empowered to truly extraordinary levels. The abuse of this to create powerful Servants has made the class referred to as the strongest of all seven classes.
It is possible to specify in the summoning ritual that the Servant be placed under the Berserker class for those familiar with the workings of the Grail System. By adding in a specific line, Zouken Matou and the Einzbern family, as members of the Three Founding Families, were able to choose the class during the Fourth and Fifth Wars. This class comes at a price, as the Master must expend a large amount of additional prana merely to maintain the Berseker, and the affected Heroic Spirit may lose access to certain abilities or even Noble Phantasms depending on how much sanity it taken away for power.
Examples: Heracles, Lu Bu, Frankenstein, Spartacus.
Anima Classes and Parameters:
Available Classes: Weaponmaster
Parameters: Strength C, Endurance D, Agility D, Mana E, and Luck E.
Berserker Class Abilities:
Mad Enhancement: Raises basic parameters in exchange for hindering mental capacities. In some cases, also seals away Personal Skills.