Aspect Of Berserk Fury can only be used by the Barbarian class. In Diablo 4, the strength of affixes are randomly generated within a range of values. This is shown in [parenthesis] in tooltip above.

Understandably, Guts was outraged, shouting in fury at Griffith as the leader of Falconia captured the woman whom he had already tortured so much. Now Guts has bigger stakes than ever as Berserk ...