Source: Tomb of Annihilation

Armor (plate), rare (requires attunement)

This suit of plate armor is fashioned from giant scorpion chitin. While wearing this armor, you gain the following benefits:

• The armor improves your combat readiness, granting you a +5 bonus to initiative as long as you aren't incapacitated.
• The armor doesn't impose disadvantage on your Dexterity (Stealth) checks.
• The armor doesn't impose disadvantage on saving throws made to resist the effects of extreme heat (see chapter 5 of the Dungeon Master's Guide ).

Curse. This armor is cursed. Whenever you don or doff it, you must make a DC 15 Constitution saving throw, taking 100 (10d10 + 45) poison damage on a failed save, or half as much damage on a successful one. Only a Wish spell can remove the armor's curse.