Yin & Yang (5e Equipment)
From D&D Wiki
Weapon (dual shortswords), artifact (requires attunement by a creature that is Neutral)
These two short-swords are modeled after the avatars of the spirits of fate, Yang is white with gold trim, and Yin is black with white trim. These magic shortswords have a +2 bonus to attack and damage rolls.
Soul Bound: 24 hours after the blades have been separated, the blades with teleport back to each other at random. If the blades have a wielder and the wielder has one of the blades, the missing blade will instead teleport back to the wielder.
Yang: This sword radiates a holy energy dealing an additional 1d8 radiant damage.
Shine: As a bonus action, you can have Yang shed 30ft of bright light and an extra 30ft of dim light. At the start of your turn, any creature of non-good alignment will take 1d6 radiant damage if it is within 30ft of you. This effect lasts until you turn it off as a bonus action.
Yin: This sword emanates a dark energy and when you strike a creature with Yang it deals an additional 1d8 necrotic damage.
Blind: As a bonus action, you can have Yin pick a creature with 30 feet of you and blind them. They can make a DC 17 Constitution saving throw to prevent them from being blinded for 1 minute. The creature may remake this saving throw at the end of every one of its their turn.
Chaos Stitching: As an action you may attack with both Yin and Yang. Make a single attack roll with advantage. On hit the target takes damage from Yin and Yang and the target must make a DC 19 Constitution saving throw or they take an additional 2d10 radiant and 2d10 necrotic damage and are incapacitated until the start of your next turn. You may use this effect two times, and these weapon regains all uses of this effect at dawn.
Neutral Weakness: If a creature is of true neutral alignment, you deal half damage to them with Yin & Yang. However, if you score a critical hit on a neutral creature, you can deal additional damage based on what weapon you were wielding, with Yang dealing 2d10 additional radiant damage or Yin dealing 2d10 additional necrotic damage.
Yang Form: As an action, you use Yang’s holy power to induce an angelic form on yourself. Evil creatures within 20ft of you cower in sight of you and must make a DC 16 Constitution saving throw at the start of their turn or if they walk in range to be given disadvantage on all their attack rolls made against you until the start of your next turn. You become immune to radiant and fire damage. Lasts for 1 minute and is only usable once. At dawn it regains its charge.
Yin Form: As an action, you use Yin’s unholy power to induce a demonic form on yourself. Good creatures within 20ft of you cower in sight of you and must make a DC 16 Constitution saving throw at the start of their turn or if they walk in range to be given disadvantage on all their attack rolls made against you until the start of your next turn. You become immune to necrotic and acid damage. Lasts for 1 minute and is only usable once. At midnight it regains its charge.
Background. Yin and Yang used to be Dragonborns of great power and prestige. They were siblings, with Yang being the younger female Cleric and Yin being the older male Sorcerer centuries ago. After they both died killing a powerful force of chaos, both their souls were sucked into two twin blades, after which they lost most of their memories and came to be known as Yin and Yang due to their power, sentience, and opposing powers.