Magic Items

Weapon (greatsword), legendary (requires attunement by a creature that has psionic ability)
This magic weapon grants a +3 bonus to attack and damage rolls made with it. While you hold the sword, you have advantage on Intelligence, Wisdom, and Charisma saving throws, you are immune to being charmed, and you have resistance to psychic damage. In addition, if you score a critical hit with it against a creature’s astral body, you can cut the silvery cord that tethers the target to its material body, instead of dealing damage.

Wondrous item (tattoo), legendary (requires attunement)
When this tattoo is applied to a creature, it takes the form of an Abeiran dragonborn sigil that marks the individual as a being of “ill nature and worse temperament.”

You have wrested away part of Szass Tam’s essence. Specifically, this spark of energy was originally wrested from the vile lich himself, and grants one dditional 9th level spell slot, provided that you already have one. This item can be found in the Dungeon Master’s Guide under the entry for Boon of High Magic.

Weapon (longsword), unique
This blade, formed from Father Llymic’s urge to destroy, is made from a bizarre, icy crystal that appears to bend and twist when viewed peripherally. When Woe’s bearer is presented with an opportunity to act violently, Woe heightens its urge to do so.
You have a +3 bonus to attack and damage rolls made with this magic weapon.
If a character wields Woe while wearing Discord (plate armor from DDAL-DRW-15 Frozen Whispers), they are unharmed by temperatures as low as −60 degrees Fahrenheit. Additionally, until the character removes Discord, they gain the flaw “Bright light enrages me.”

Armor (Plate), Unique

Discord is comprised of sharp, interlocking spikes of green crystal and extinguishes all nonmagical flames within 30 feet of it. A creature wearing Discord hears insidious whispers originating from a point just beyond their peripheral vision. Unless deafened, the creature has disadvantage on saving throws caused by, and on Wisdom checks related to, Father Llymic and its allies.

While wearing this armor, you gain a +2 bonus to AC (AC 20). In addition, you can use your reaction to see normally in darkness, both magical and nonmagical, out to a distance of 120 feet until the start of your next turn. Discord can’t be used this way again until the next dawn.

If a character wields Woe (a longsword) while wearing Discord, they are unharmed by temperatures as low as −60 degrees Fahrenheit.