Revenant Blade

Prerequisite: Elf

You are descended from a master of the double-bladed scimitar, and some of that mastery has passed on to you.
You gain the following benefits:

• Increase your Dexterity or Strength score by 1, to a maximum of 20.

• While you are holding a double-bladed scimitar with two hands, you gain a + 1 bonus to Armor Class.

• A double-bladed scimitar has the finesse property when you wield it.

Source: Eberron: Rising from the Last War