College of Strings

To gain any benefits from the College of Strings, a stringed instrument must be used as your spellcasting focus.

Harmonics

When you join the College of Strings at 3rd level, choose lightning, thunder, or force damage types, this is your Harmony. Any time you cast a bard spell that deals damage you can replace its damage type with your Harmony as the spell's damage type. You gain resistance to your Harmony’s damage type.

Legato

Also at 3rd level, you learn to add musical power to the strikes of your allies. A creature that has a Bardic Inspiration die from you can roll that die and add the number rolled to a weapon or spell damage roll it just made, the additional damage type is your Harmony.

Cadenza

At 6th level, you learn to repulse enemies with harmonic blasts after they strike your companions. After an enemy hits another allied creature within 30 feet with a weapon or spell attack, as a reaction you can spend a spell slot to cast Thunderwave. Thunderwave originates from the hit ally and is directed at the attacking enemy. Thunderwave’s damage type is treated as your Harmony’s damage type. The level of Thunderwave is equal to the level of spell slot you spent.

Intonation

At 14th level, you learn to re-tune your stringed instrument to better suit the song being played. At the end of any short or extended rest you can change your Harmony, and can choose from any damage type.