Inspired Rage

At 1st level, affected allies gain a +1 bonus to melee attack and damage rolls and a +1 bonus on Will saving throws, but also take a –1 penalty to AC. While under the effects of inspired rage, allies other than the skald cannot use any ability that requires patience or concentration. At 4th level and every 4 levels thereafter, the song's bonuses on Will saves increase by 1; the penalty to AC doesn't change. At 8th and 16th levels, the song's bonuses to attack and damage increase by 1. (Unlike the barbarian's rage ability, those affected are not fatigued after the song ends.)