Upon reaching 3rd level, you can use your Second Wind feature twice instead of once, regaining both uses on a short rest. Whenever you use Second Wind you may choose any number of creatures within 30ft of you to receive half as much health.

Starting at 3rd level, once per turn when you hit a creature with a weapon attack you can cause an ally to use their reaction to make a weapon attack against that target. You can apply one Weapon Mastery that you know to their attack, regardless of what weapon they use. You can use this feature 4 times, regaining spent uses on a short or long rest.

Beginning at 7th level, whenever you or an ally that you can see fails a saving throw, you can expend a use of your Indomitable feature to cause any number of creatures to instead succeed on the first saving throw made against that effect in the next minute.

Beginning at 10th level, whenever you roll initiative, you can choose two friendly creatures and have them swap the places on initiative. You may then allow any number of friendly creatures that you can see move up to half their movement speed without provoking opportunity attacks.

Beginning at 15th level, your experience in battle has allowed you to become a stronger leader in a fight, granting the following benefits; 

• When you use your Rallying Cry feature you can instead choose any number of creatures within 60ft, and they recover as much health as you do. 

• When you use your Focus Target feature you can choose up to 2 allies to make the attack, and up to 2 Weapon Masteries to add.

As an action, you can either cause all allies that you can see to gain advantage on all attack rolls until the end of your next turn, or cause all attack rolls made against those allies to have disadvantage until the end of your next turn.