Arcane Armor
Armor (light), Legendary (requires attunement)
Aura: Very Strong Abjuration and Transmutation
You have a +2 bonus to AC while wearing this armor. If you die while wearing the armor, the armor is destroyed as it slowly melts away and dissipates.
Arcane Ward. The armor has 50 charges and regains all expended charges each day at dawn. Whenever you take any damage, that damage is reduced by 3, and the armor expends 3 charges. In addition, whenever you are the target of a spell of 3rd level or below, that spell fails and has no effect, and the armor expends charges equal to 5 + the spell’s level. So long as the armor is at 0 charges, neither of these traits function.
In addition, so long as the armor has at least 1 charge remaining, you have darkvision to a range of 60 feet, advantage on saving throws against being charmed or poisoned, and magic can't put you to sleep.
Arvoreen's Chain Mail
Armor (chain mail), Very Rare (requires attunement by a halfling)
Aura: Strong Evocation
You have a +2 bonus to AC while wearing this armor.
This armor has 10 charges and regains 1d6+2 expended charges daily at dawn. While wearing it, you can use an action to expend 1 or more of its charges to cast the cure wounds spell, targeting yourself. For 1 charge, you cast the 1st-level version of the spell. You can increase the spell slot level by one for each additional charge you expend.
Aslyferund's Armor
Armor (scale mail), Legendary (requires attunement)
Aura: Very Strong Abjuration
Fashioned by a renowned smith from golden dragon scales and decorated with three holly berries etched into the center of the chest, there were only six of these breastplates known to have been created. You have a +2 bonus to AC while wearing this armor and are considered proficient with this armor even if you lack proficiency with medium armor. This armor does not impose disadvantage on your Dexterity (Stealth) checks like regular scale mail would. In addition, while wearing the armor, you are immune to fire damage as well as bludgeoning, piercing and slashing damage from nonmagical weapons.
Armor of Blackflame
Wondrous Item, Very Rare (requires attunement)
Aura: Strong Abjuration and Evocation
This armor appears to be a shimmering black suit of plate. The armor weighs nothing and does not impose disadvantage on Dexterity (Stealth) checks, but it also provides no AC and can’t be worn over other armor. You may wear this armor even if you do not have proficiency with heavy armor.
While being worn, the armor creates a vague, shifting aura of darkness, concealing you from magical scrutiny. You can’t be targeted by any divination magic or perceived through magical scrying sensors. In addition, you have resistance to cold and fire damage.
Armor of Blending
Armor (light), Uncommon (requires attunement)
Aura: Minor Illusion
This armor appears to be a mundane suit of armor, and anyone who views it with detect magic spell, must succeed on a DC 14 Intelligence saving throw to see anything other than an ordinary suit of nonmagical armor. As a bonus action, you can command the armor to change its appearance either to look like a set of normal clothing or to return to its normal appearance.
Here are some more magic items converted from the Dungeons and Dragons 2e Encyclopedia Magica into 5e and published on the DMsGuild under Artifacts of Antiquity Volume 2. You haven't seen the last of armors here, and the list goes on and on!