Touch of Corruption

*This is per say not a cantrip, but a class feature, as an Oathbreaker, you have been touched by a darker power, therefor you have lost your Lay on Hands ability and gained this instead.*

Your touch inflicts pain and suffering. You have a pool of necrotic energy. With that pool, you can corrupt others to inflict damage. As an action, you can touch a creature and draw power from the pool to deal 1d6 necrotic damage per point expended from the pool, up to a maximum of 5d6 per touch. if the target will be killed by the touch you replenish half the damage done to the target, no more than the remaining amount of HP the target has at the moment of the touch. You have 2 points per level. Points will be fully replenished per long rest, 1 point will be replenished per short rest.