Battle Rage

Battle Rage is a Tactics skill. It resembles the Battle Command skill from the previous game, but only affects the Barbarian.

In-game
Like all Tactics skills, Battle Rage is an instant cast, and can be used at any time, including while on the move or while performing any other attack. However, unlike Threatening Shout and, it only affects the Barbarian, and costs Fury instead of generating it. To compensate for this, this skill is effectively a passive buff to the Barbarian's offensive capabilities, as it has a powerful duration of effect even without the Inspiring Presence passive skill.

Unlike similar skills of other classes, Tactics shouts are not mutually-exclusive, and may be combined with each other.

Runes

 * increases bonus damage to.
 * Increases movement speed by.
 * While affected by Battle Rage, all Critical Hits will heal the Barbarian and their pets, amount decreased by Proc Coefficient. Amount healed scales with level, up to at level 70.
 * Under Battle Rage, the Barbarian will gain additional Critical Hit Chance for every enemy within  yards of themselves.
 * Under Battle Rage, deals damage equal to 20% of total damage of the recent Critical Hits to enemies within yards every second.

Non-rune enhancements

 * Horde of the Ninety Savages Set (Set bonus for 2 pieces): doubles the effectiveness of Battle Rage.

Passives

 * Inspiring Presence: doubles the duration and, when cast, also increases Life regeneration for the Barbarian and all allies within 100 yards by 3% of their maximum Life per second for 60 seconds.

Development
In the days before the pre-expansion patch for Reaper of Souls, the Into the Fray rune actually provided a chance for the Barbarian's Critical Hits to generate 15 Fury, in addition to any Fury that was already generated by the hit. While it was meant to allow Barbarians a way to deal damage without having to make use of a Primary skill, it ultimately proved too powerful for game balancing reasons, especially when combined with the Wrath of the Berserker's Thrive on Chaos rune. With the aforementioned combination in effect, the Barbarian was a virtually unstoppable force. Nothing short of killing the Barbarian very quickly could put an end to their otherwise very long blood-thirsty reign over the minions of Hell.

Trivia

 * The name of the Swords to Ploughshares rune is a possible reference to the Bible, Isaiah 2:3–4: And He (Lord) shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruning hooks: nation shall not lift up sword against nation, neither shall they learn war any more. In the real world, it is a common expression for converting the military technology for civilian use.