Curse of Loss

You stab a creature. You must make an attack roll to hit with a DC equal to the creatures AC. If the roll succeeds, you will have one stack of Curse of Loss active on the creature. Each time you succeed this roll on the same creature, you will recieve more stacks.

You can also choose to enact the Curse using one Action. Doing so consumes all stacks active on the creature, and instead deals 20 * (amount of stacks) piercing damage.