Hungry Double-Bladed Scimitar

A hungry weapon, a creation of the daelkyr, is formed from muscle and bone. It may moan, growl, or wail, and it twists in your grip if it doesn't like you. If any creature attempts to wield this weapon while not attuned to it, it has disadvantage on attack rolls made using the weapon. Additionally, if you are attuned to this weapon when another creature tries to wield it, the weapon's hilt extrudes sharp thorns and that creature takes 1d4 points of piercing damage each turn. While attuned to and wielding this weapon, you can use a bonus action to bond to it, causing tendrils from the hilt of the weapon to burrow into your flesh. While bonded to it, you gain the following benefits:

• The weapon is bound to your hand and can't be removed from your grasp, voluntarily or involuntarily. If it's a two-handed weapon, only one of your hands is bound to the weapon.

• When you hit a creature with this weapon, you can choose to spend one Hit Die to deal additional damage with the attack, and as you do, drain the life from your foes. Roll the Hit Die and add your Constitution modifier; the attack deals extra necrotic damage equal to the result, and you regain an equal number of hit points.

You can end the weapon's bond as an action, causing the tendrils to retract so you can release the weapon. You can remain attuned to the weapon regardless of whether you're bonded to it.

The double scimitar is the signature weapon of Valenar elves. A haft of fine wood supports a long blade on either end. Forged with techniques honed over tens of thousands of years, these blades are strong, sharp, and remarkably light. Each scimitar is a masterpiece, and as a result the double scimitar is an expensive weapon, but few people ever have an opportunity to purchase one. If you're an elf, your blade could have a long and storied history. If you're not an elf, you might have stolen the weapon from a fallen foe or received it from a dying Valenar ally. If you work with your DM to create the story behind your double scimitar, you can start with the weapon at 1st level in place of a martial weapon normally granted by your class. However, it can be dangerous for a non-elf to carry a double scimitar. Valenar may demand its return or challenge you to prove that you're worthy to wield it.

Special: If you attack with a double-bladed scimitar as part of the Attack action on your turn, you can use a bonus action immediately after to make a melee attack with it. This attack deals 1d4 slashing damage on a hit, instead of 2d4.

Two-Handed: This weapon requires two hands when you attack with it.

Proficiency: martial, double-bladed scimitar Source: Exploring Eberron p. 230 (Third Party), Eberron: Rising from the Last War p. 21, Wayfinder's Guide to Eberron p. 74