If you are not attuned to this weapon, it is a +1 Longsword.

Once you are attuned you gain the following benefits:

This weapon can be used as your pact weapon and you can change the form of the weapon as you choose.

You gain a +3 to your attack and damage rolls 

Damage: 1d8+3/whatever form you choose the pact weapon to take+2d6 of the chosen Bonus Damage Type

This weapon has 3 charges that recharge daily at dawn. You may expend one of these charges as part of an attack or as a bonus action if you are not attacking something. You may choose from the following damage types: Fire, Cold, Poison, Acid, Force, Necrotic, Psychic, Lightning, Radiant. The Damage type will stay until you use a charge to change it.

Once per day, you may speak the command words of The Ruby River when you hit a target and they must make a Charisma Save or be turned into a Sentient Ruby that can only speak and see for 2d20+20 Days.

DC for Charisma Save = Spell Save DC

The Blade of this weapon is made of pure ruby, and has a Golden Guard in the shape of  Dragon Claws and a Golden hilt that is inlaid with Ruby as well as a Pommel made of 4 Golden Dragon Scales.

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Melee Attacks, Hexblade Warlock, Pact of the Blade, Versatile, Sap