Bard sub-class
Prime ability: Intelligence & Charisma; the Bard is a subclass of the Thief core class. The bard is even more skilled with her tongue than with the blade. She uses the power of song, music, word, and verse to aid her allies, discomfit her foes, and advance the security of civilization and the propagation of culture to the next generation.
Party Boon at Bard 1: A party with a bard gains Advantage on saving throws against audible attack forms: siren's song, great shout, etc. Additionally, party members (but not the bard herself) get a bardic bonus equal to the Bard's Charisma bonus on all saving throws. A party member must be within sixty feet of the bard to get this bonus.
Personal Boon at Bard 3: At third level the Bard gains Bardic Warding, a potent ability in the form of a Heroic Deed.
At Bard level 1, the bard character chooses an instrument that is light and portable (flute, zither, ukelele, mandolin, small harpsichord). She gains a masterwork version of the desired instrument as a personal possession, and an initial Perform Flute +3 (substitute desired musical instrument for Flute) trait. As a thief subclass, the Bard may have a trait bonus in Perform [Instrument] that exceeds +3.
Bard level 1 also gives access to the Guidance Heroic Deed. Bards may not stack multiple Guidance effects.
At Bard 2, the Bard may confer Bardic Inspiration upon an ally once daily. That ally gains a 2d4 dice roll that they can use once only within the next hour to enhance a skill check, attack to-hit roll, or saving throw.
At Bard 3, the Bard is able to add her Charisma modifier as additional damage when delivering Circle or Backstab damage to a foe. This is in addition to the typical Dexterity modifier to such damage. Additionally, at Bard 3 the bard gains access to the Enhance Ability Heroic Deed.
At Bard 4, a bard's allies add the bard's Charisma modifier as a bonus on the Advantage they gain on saving throws against audible effects, and the Bard herself becomes immune to audible/sonic attacks.
A Bard 5 with 20+ overall levels may, as a full-round action precluding movement, attacks, Fray die usage, and heroic deed usage, use his voice and/or instrument to magically duplicate any class-based boon of another class. The benefits apply to the bard and to any allies within thirty feet.
The Bard subclass contains five levels.