Ability: Once per day a number of times equal to your Charisma modifier (a minimum of once per day), while the cleric is engaged in combat, the cleric can inspire his allies with his fighting prowess. All allies within 30 feet that are aware of the cleric's presence gain a +2 morale bonus on natural weapon or unarmed attack and damage rolls and a +1 morale bonus to Saving throws verses fear effects per 4 cleric levels to a maximum bonus of +5. (So a 5th level cleric would grant a +2 to saves, attack and damage, a 9th level cleric would grant a +3). This ability lasts for one round and can be activated as a swift action. If the cleric is incapacitated in any way, the effect ends immediately. In addition, a cleric may use a Turn Undead attempt, or similar ability attempt, to use this Courage domain ability additional times.
I have altered it, what do you think?