Phalanx Fighter (5e Feat)
From D&D Wiki
You've mastered combat tactics that you have learned to best fight as a team. You gain the following benefits:
- When you use the Help action to aid another creature in combat, that creature has advantage on each attack roll made against your target.
- When you are aided or aiding in combat against a creature, the aided creature has a +2 to damage rolls.
- As a bonus action on your turn, you can increase your reach with a weapon with the versatile property by 5 feet for the rest of your turn.