Wolkaft Discordant Shield

You use raise your instrument and use it to protect you. Until the start of your next turn, you have a +5 bonus to AC, including against the triggering attack.

When hit, the instrument lets out a discordant jangle. The attacker must make a Wisdom save against your spell save dc or take 2d6 psychic damage and must immediately use its reaction, if available, to move as far as its speed allows away from you. It is also Frightened of you until the start of your next turn. The creature doesn’t move into obviously dangerous ground, such as a fire or a pit. On a successful save, the target takes half as much damage and doesn’t have to move away. A deafened creature may automatically succeed on this save.