You have absorbed a Fragment of Suffering-- a tangible representation of an emotion felt by the Apotheon.

Benefit. When you hit a creature with an attack, you can deal either an extra 2d6 psychic damage to the creature or 4d6 psychic damage to each creature within 5 feet of it. After you use this benefit, you must finish a short or long rest before you can use it again.

Drawback. Whenever you are not unconscious and fail a saving throw, you take 2d6 psychic damage.

You can use an action to transfer this fragment to another creature by touching the fragment’s intended recipient. When a fragment leaves a creature, that creature loses the benefit and drawback conferred by the fragment.