Commander's Challenge
Every time you attack an enemy, whether the attack hits or misses, you can choose to mark that target. The mark lasts until the end of your next turn. While a target is marked, it takes a –2 penalty to attack rolls for any attack that doesn’t include you as a target. A creature can be subject to only one mark at a time. A new mark supersedes a mark that was already in place.
Whenever a marked enemy that is adjacent to you shifts, each ally within 5 squares of you gains a +1 bonus to all defenses until the start of your next turn. This is cumulative up to your Wisdom modifer.
Whenever a marked enemy attacks an ally, as an immediate interrupt, you can allow the ally to make a basic attack versus that enemy. The ally can refuse to make the basic attack in order to gain 3+your Wisdom modifer temporary hitpoints. Increase the temporary hitpoints to 6+Your Wisdom Modifier at 11th level and 9+Your Wisdom Modifier at 21st level.
The "allowing the ally to choose" verbage is confusing the whole package... let the commander choose. He'll chose what the ally wants anyway. And then you've got +6 and +9 both kicking in at 11th level, because you specified it by level once and by tier the 2nd time.
