You can attack twice instead of once whenever you take the Attack action on your turn.

Your years of fighting in back alleys and taverns have given you mastery over combat styles that use Unarmed Strikes and Pugilist weapons. You gain a Bonus Action Unarmed Strike, use a Fisticuffs die of 1d8 for Unarmed Strikes and Pugilist weapons, and can use improvised weapons as if they had the Sap mastery property.

As a bonus action, you can provoke a creature within 60 feet that can see or hear you. On a failed Wisdom saving throw, it takes psychic damage equal to your Fisticuffs die plus your Constitution modifier and has disadvantage on attack rolls against creatures other than you until the start of your next turn. Save DC = 8 + proficiency bonus + Constitution modifier.

As a bonus action, for 10 minutes you gain resistance to bludgeoning, piercing, and slashing damage, and you ignore exhaustion levels lower than 6. You can use this once per long rest, or again by taking 1 level of exhaustion.

You can use a bonus action to dig deep into sheer stubborn force. This is the classic survival burst of the pugilist, and Serriah uses it like a spotlight cue for violence.

When you take damage, you can use your Reaction to regain all expended Moxie Points. If you are Bloodied, you also gain temporary hit points equal to four times your Pugilist level. You can use this once per Short or Long Rest.

You know how to inspire and mystify with performance, magic, and social grace. You are a full bardic spellcaster and gain the bard features for all levels 1 through 14, including Bardic Inspiration, Jack of All Trades, Song of Rest, Expertise, Font of Inspiration, Countercharm, Magical Secrets, and Superior Inspiration.

A character who thrives on style and performance, gaining proficiency and social presence that can turn an audience into allies.

While wearing Light or no armor and not wielding a Shield, your base Armor Class equals 12 plus your Constitution modifier.

You can spend Moxie Points to Brace Up, One-Two Punch, or Stick and Move. You regain all expended Moxie Points after a Short or Long Rest.

When you fail a Strength, Dexterity, Constitution, or Charisma check, you can expend a Moxie Point to add your Fisticuffs die to the roll. If the check still fails, you regain the point and cannot use this feature again until you finish a Short or Long Rest.

When you hit a creature with an Unarmed Strike, you can apply the damage and also choose the Grapple or Shove option.

You gain the Piss and Vinegar Pugilist subclass, a vicious and theatrical fighting style built around taunts, dirty tricks, and combat provocation.

You gain proficiency in Intimidation if you do not already have it, and you add your Strength modifier, minimum +1, as a bonus to Intimidation checks.

You gain an Ability Score Improvement or feat. Bard levels do not grant feats in 2014 rules, but Pugilist levels 4, 8, 12, and 16 do, and all are included here as part of this multiclass build.

When you make an attack with an Unarmed Strike or Pugilist weapon, you can expend 1 Moxie Point to deal maximum damage on a hit and regain the point.

Your Unarmed Strikes and improvised weapon attacks can deal your choice of force damage or their normal damage type.

You gain one of the following Dirty Tricks each turn, and each trick refreshes after a Short or Long Rest. Heelstomper can reduce a creature's speed to 0 on a failed Dexterity save. Low Blow grants advantage against the target on attacks until the end of your next turn on a failed Strength save. Pocket Sand can blind a creature within 10 feet on a failed Constitution save until the end of its next turn.

You regain a Bardic Inspiration use when you finish a Short or Long Rest once per day beginning at 5th level, and at higher bard levels you become a full battlefield manipulator and master performer.

At bard 6, you gain Countercharm and Expertise. At bard 10, you gain Magical Secrets. At bard 14, you gain a second Magical Secrets selection and Superior Inspiration.

You can always find a place to perform, and people willing to hear you. In civilized settlements, you can usually secure free lodging, food, and support from fans, admirers, or those intrigued by your reputation.