Oppressor Plate

Magic Armor (Plate), Rare

Indomitable. This set of plate armor gives a flat AC of 20. It requires an 18 Strength to wear.

Damage Reduction. Every time you take damage that is not psychic damage while wearing this armor, reduce the damage taken by your Proficiency Bonus. If this reduces the damage to zero, you take no damage.

Unwieldy. This armor imposes disadvantage on stealth checks made when wearing it. Due to its weight and unwieldiness, your speed is reduced by 5 feet, you cannot benefit from shields, and you have disadvantage on dexterity saving throws.

Not to be confused with the Oppressor Plate armor from the Upside, this armor is a magical variant of that version.