Battle Frenzy

From Diablo 4 Wiki

Battle Frenzy is an upgrade to Frenzy, a Barbarian skill from the Basic Skill Tree. For full information on this skill visit the Frenzy page.

Upgrade Hub
Battle Frenzy

While Berserking, your other skills gain 5% Attack Speed for each stack of Frenzy you have.

Requires point in Enhanced Frenzy.