+2 damage to weapon attacks (1d4 necrotic damage).
Also at 2nd level, you learn to invoke a rite of hemocraft that infuses your weapon strikes with elemental energy. As a bonus action, you can activate any rite you know on one weapon you’re holding. The effect of the rite lasts until you finish a short or long rest. When you activate a rite, you take necrotic damage equal to one roll of your hemocraft die. This damage can’t be reduced in any way.
While the rite is in effect, attacks you make with this weapon are magical, and deal extra damage equal to your hemocraft die of the type determined by the chosen rite. A weapon can hold only one active rite at a time. Other creatures can’t gain the benefit of your rite.
You choose one rite from the crimson rites below when you first gain this feature. You learn an additional crimson rite at 7th level, and again at 14th level.
Rite of the Flame. Your rite damage is fire damage.
Rite of the Frozen. Your rite damage is cold damage.
Rite of the Storm. Your rite damage is lightning damage.
Rite of the Dead. Your rite damage is necrotic damage. (Prerequisite: 14th level)
Rite of the Oracle. Your rite damage is psychic damage. (Prerequisite: 14th level)
Rite of the Roar. Your rite damage is thunder damage. (Prerequisite: 14th level)