Rare Weapon (Dagger), Finesse, Light, Requires Attunement

• You gain +1 bonus to attack and damage rolls made with this magical weapon.
• Deals extra 1d4 weapon damage against dragons type creatures. 

Næegling’s Broken Legacy. When you score a critical hit with the Shard, you can decide to roll all of the attack’s damage thrice instead of twice and deal extra 4d4 weapon damage after that. But the already broken sword snaps again, temporarily destroying itself and making you lose attunement on it. It reappears in your hand after you finish your next long rest, fully repaired. 

Ring of Gram. This broken sword was once a fabled majestic artefact, but only fragments of its power still remain.
As a bonus action, you can change this sword’s form into a battered golden ring and vice versa.
While the Shard is in ring form, you can use your action to activate its power of influence, giving you proficiency in Persuasion, Intimidation and Deception, unless you are already proficient and a +5 bonus on all your charisma ability checks for 10 minutes. After you use this effect, you can’t turn the Shard into its dagger form until the end of your next long rest. 

Tip of Ascalon (Recharge 6). As a bonus action, you can turn this weapon into a spectral spear of radiant light until the end of your turn. It keeps all of its stats, base damage and properties, but also gains the Thrown (60/180) property, and deals extra 1d4 radiant damage. The radiant damage is doubled against Dragon type enemies.