Souleater

You have learned to put your inner-most darkness into your weapon strikes.

• Increase your Constitution score by 1, to a maximum of 20.
• You can use your bonus action to invoke the power of the souleater, and roll one of your hit die. The number you roll with your hit die determines the amount of necrotic damage you take. This damage bypasses necrotic resistance and immunity.
• When you take necrotic damage from souleater, your next attack deals extra force damage equal to your hit die.
• Souleater can be used a number of times equal to your proficiency bonus, and must finish a long rest to replenish all uses.
• At Higher Levels: The number of hit die is increased by 2 when you reach 5th level, 4 at 11th level, and 6 at 17th level.