From D&D Wiki
|This material is published under the OGL|
Incite Rage [Epic]
When the character enters a rage, he or she can incite a barbarian rage in any or all allies within 60 feet. (Any ally who doesn’t wish to become enraged is unaffected.) The ally gains +4 to Strength, +4 to Constitution, and a +2 morale bonus on Will saves, but takes a –2 penalty to AC, for as long as the character remains raging. The rage of affected allies lasts a number of rounds equal to 3 + their Constitution modifier, regardless of whether they remain within 60 feet of the character. This is otherwise identical with normal barbarian rage (including the fatigue at its end).
This is a mind-affecting effect.