The Ichor of pacts

This is a +1 Scimitar
While attuned to this weapon, your body changes to be similar to a melvolent patron, you gain the following racial features

Bloody Toll.
as a bonus action you can cause you or a willing ally within 5ft to take 1d12 necrotic damage. Doing so gives you 1 blood point to a maximum equal to your warlock level

Pactbound Brethren
As a bonus action, You may spend 1 blood point and choose an ally within 5ft. That ally deals an additional +2 necrotic damage to their damage rolls till the start of your next turn

Seal of the wicked.
as a bonus action, you may spend 4 blood points and choose an ally within 5ft. That ally may cast eldritch blast using their own level and charisma modifer until the start of your next turn.

Broken and Damned.
as a bonus action, you may spend 8 blood points and cause you or an ally within 5ft to not be reduced to below 1 hp from damage till the start of your next turn.

History

From Enderdragon Encounter

Rarity

Very rare Scimitar (requires attunement by a warlock)