You channel your own lifeforce into your melee weapon, drawing your blood in, to unleash devastating hits that cause the opponent's wounds to wither from necrosis.
You spend one Melee Attack Action to channel your lifeforce into your melee weapon, taking 2d10 necrotic damage, to infuse your melee weapon attacks with an extra 1d10 necrotic damage on a hit for up to 1 minute with Concentration.