Martial Archetype
Knight Banneret
The Knight Banneret is a fighter skilled at leading soldiers into battle. The mere presence of a knight in a hamlet is enough to cause some orcs or bandits to seek easier prey.
Banner Leader
When you become a knight banneret, you learn to bolster your companions.
On your turn, as a bonus action, you can give all creatures of your choice within 60 feet of you can a 1d4 bonus to any attack roll, ability check and saving throw it makes before the beginning of your next turn.
You can use this feature up to three times between long rests.
Rallying Recovery
When you use your second wind feature, friendly creatures within 60 feet who can see or hear you restore a number of hit points equal to your fighter level + your Charisma modifier.
Inspiring Surge
Starting at 10th level, when you use your action surge feature, you can choose one creature within 60 feet of you that is friendly to you. That creature can immediately use a reaction to immediately take an action, provided that it can see or hear you.
Starting at 15th level, you can choose two allies within 60 feet of you, rather than one.
Bulwark
Beginning at 15th level when another creature within 60 feet of you fails a saving throw, you can use your reaction if that creature can see or hear you to have that creature reroll its saving throw. The target must use the new roll.
You can use this feature once between long rests.