Dragonfyre

History
When the Ancient female Red Dragon named Bahyolnos suffered a fatal wound during the battle against fire giants for control over the contested territory in Southernia. Her lover, the ancient red dragon named Nahtoormaar, could not bear to see her leave the mortal coil so he had his dragonborn sorcerers bind her soul to a blade now nicknamed Dragonfyre. Dragonfyre was then given to his most trusted commander to use against the fire giants. Bahyolnos, however, would hinder herself to those who first wield her to prove themselves to her.

Properties
You gain a +3 bonus to Attack and Damage Rolls made with this Magic Weapon. In addition, the weapon ignores Resistance to slashing damage. This weapon does 4d8 slashing damage and 4d8 fire damage.

Frightful Presence: Each creature of Dragonfyre's choice that is within 120 feet of the sword and aware of it must succeed on a DC 33 Wisdom saving throw or become Frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.

Fire Breath: Once a day, Dragonfyre can unleash her fiery fire breath upon her enemies. When the wielder says her command word, Bahyolnos, she unleashes a powerful fire breath in a 90-foot cone. Each creature in that area must make a DC 32 Dexterity saving throw, taking 23d6 fire damage on a failed save, or half as much damage on a successful one.

Giant Soul Devourer: When this sword hits any type of giant creature, it deals double slashing damage. Whenever the wielder kills any type of giant, the soul is devoured.

Sentience: Dragonfyre is a sentient chaotic evil longsword with an Intelligence of 16, a Wisdom of 16, and a Charisma of 28. It has hearing, blindsight, and darkvision of 120 feet. It can speak, read, and understand Common and Draconic. This sword speaks telepathically to the wielder.

Personality: Bahyolnos is a very cynical dragon, often talking down to others she feels are insignificant. While she hates other common enemies of dragons, such as the metallics, she especially hates giants of all kinds, with a special hatred toward stone giants. She feels no love of other dragons, and sees other red dragons as competition.