Hellwalker's Mantle

Wondrous item, Rare, Requires attunement by a character who has spent 1 hour in the Inferno

Trauma Escape. When you take psychic damage, you can spend your reaction to disappear to a silent, dark, void demiplane. At the start of your next turn, you reappear at the location where you disappeared, or at the nearest unoccupied location.

Mental Brace. Once per short rest, as an action, you can deal yourself 1d8 psychic damage to gain 10 temporary hit points.

Infernal Visions. While you are grappled or restrained by a creature that you are in contact with, you can fill your assailant's mind with dark visions of burning hellscapes. As an action, you and all creatures grappling or restraining you that you are in contact with take 3d6 psychic damage. Once you use this property, you can't use it again until you complete a short rest.