When you use a spell, a bardic performance, or another class feature to grant a morale or competence bonus, the bonus increases by 2 for creatures with at least 4 Hit Dice fewer than you. For example, if you're a 6th-level bard using inspire courage, creatures with 2 Hit Dice or fewer receive a +4 morale bonus on fear saves and a +4 competence bonus on attack and weapon damage rolls instead of +2.
