Berserk

Berserk and rage are combat focus skills that enhance your attack ability at
the cost of some of your defensive caution. Rage is more powerful than its
prerequisite skill, berserk, but both function identically. Simply type the
appropriate command and you will enter the enraged or berserker state, and
will then stay there until the effect wears off (or you let it go).

See also: help skill berserk
help skill rage