You Set Them Up, I Finish

Command
Cost: 
4 command points
Action: 
Interrupt
Target: 
One nearby ally (on the ally's turn) that hits an enemy you can see with an attack this turn.
Effect: 

Add your Charisma modifier to the damage dealt by your ally (double your Charisma modifier at 5th level; triple it at 8th level). In addition, during your next turn, you gain a +2 attack bonus with melee attacks against the enemy that your ally hit.

Adventurer Feat: 

The target ally also gains the damage bonus with any other attacks it makes against the same enemy this turn.

Champion Feat: 

The command now costs 3 command points to use.

Epic Feat: 

Your attacks that benefit from the +2 attack bonus against that enemy also add triple your Charisma modifier to your damage on a hit.