Dragon Master's Sword (5e Equipment)

Weapon (katana), very rare (requires attunement)

This ancient sword was said to be created to be wielded against the dragons of old. You have a +2 bonus to attack rolls with this magic weapon. It deals 3d8 additional damage against creatures of dragon type, and you may add your proficiency bonus to Charisma based skill checks against them, even if you are already proficient.