Blood Armor of Chaos (5e Equipment)
From D&D Wiki
Armor (plate), very rare (requires attunement)
This armor looks like a normal suit of armor, but it is the armor of chaos – irrevocably fused with the flesh of the wearer.
Upon donning this plate armor, chaos takes hold and tendrils grab at your flesh from the inside. Taking deep root in your nervous system and becoming one with you. Without some sort of magical or surgical intervention, this armor becomes one with its host. In addition to granting the normal benefits of plate armor, the blood armor of chaos also grants an +3 AC bonus.
Curse. Once the blood armor is donned, it becomes one with the wearer and cannot be removed by any means, other than a greater restoration or wish spell. The heavy armor prevents resting comfortably, reducing the hit points and hit die they would regain through short and long rests by half. In addition, they are no longer able to bath properly, and the armor starts to slowly rust, granting them disadvantage on saving throws to withstand diseases. After 2 weeks of being fused to the body, the wearer begins to smell horribly because of this, granting them disadvantage on Charisma (Persuasion) checks.