Conquering Host

you gain the following benefits:

• you gain proficiency in a martial weapon or your choice
• you can, once between short rests, while within 5 feet of an ally, when you hit with a melee attack, deal an additional 1d4 damage.
• you have an advantage on charisma checks to interact with goblins, hobgoblins, bugbears, and anything else the DM classifies as "golbliniods."