A VERY small list of uncommon and rare items that are available in the 5th Edition System Reference Document - making them free to use without having to pay WotC for the D&D license like Larian did. I only included items that had binary powers that could be implemented into BG3 - so no flying, no climbing/swimming, no illusions, no telepathy, no summoning random critters. basically nothing that would need on-the-fly improvisation by the Dungeon Master.
Amulet of Health
Wondrous item, rare (requires attunement)
Your Constitution score is 19 while you wear this amulet. It has no effect on you if your Constitution is 19 or higher without it.
Belt of Dwarvenkind
Wondrous item, rare (requires attunement)
While wearing this belt, you gain the following benefits:
Your Constitution score increases by 2, to a maximum of 20.
You have advantage on Charisma (Persuasion) checks made to interact with dwarves.
In addition, while attuned to the belt, you have a 50 percent chance each day at dawn of growing a full beard if you're capable of growing one, or a visibly thicker beard if you already have one.
If you aren't a dwarf, you gain the following additional benefits while wearing the belt:
You have advantage on saving throws against poison, and you have resistance against poison damage.
You have darkvision out to a range of 60 feet.
You can speak, read, and write Dwarvish.
Boots of Striding and Springing
Wondrous item, uncommon (requires attunement)
While you wear these boots, your walking speed becomes 30 feet, unless your walking speed is higher, and your speed isn't reduced if you are encumbered or wearing heavy armor. In addition, you can jump three times the normal distance, though you can't jump farther than your remaining movement would allow.
Cloak of Protection
Wondrous item, uncommon (requires attunement)
You gain a +1 bonus to AC and saving throws while you wear this cloak.
Gem of Brightness
Wondrous item, uncommon
This prism has 50 charges. While you are holding it, you can use an action to speak one of three command words to cause one of the following effects:
The first command word causes the gem to shed bright light in a 30-foot radius and dim light for an additional 30 feet. This effect doesn't expend a charge. It lasts until you use a bonus action to repeat the command word or until you use another function of the gem.
The second command word expends 1 charge and causes the gem to fire a brilliant beam of light at one creature you can see within 60 feet of you. The creature must succeed on a DC 15 Constitution saving throw or become blinded for 1 minute. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
The third command word expends 5 charges and causes the gem to flare with blinding light in a 30-foot cone originating from it. Each creature in the cone must make a saving throw as if struck by the beam created with the second command word.
When all of the gem's charges are expended, the gem becomes a non magical jewel worth 50 gp.
Luckstone
Wondrous item, uncommon (requires attunement)
While this polished agate is on your person, you gain a + 1 bonus to ability checks and saving throws.
Wand of the Warmage
Wand, uncommon (+1), rare (+2), or very rare (+3) (requires attunement by a spellcaster)
While holding this wand, you gain a bonus to spell attack rolls determined by the wand's rarity. In addition, you ignore half cover when making a spell attack.
