Hang Tough!

Flexible melee attack
Natural odd roll

Give a nearby ally temporary hit points equal to your Charisma modifier.

Adventurer Feat: 

If the ally is staggered, double the temporary hit points.

Champion Feat: 

Add your level to the temporary hit points given (add before any doubling).

Epic Feat: 

You can choose yourself instead of an ally as the target of the battle cry.