Gloaming ArcWeapon 11
Source Pathfinder #183: Field of Maidens
Damage 1d6 Slashing
Type Martial
Price 1,250 gp
Weight 1 bulk
This black +2 striking scimitar reflects light only along its edge, like a thin crescent moon. It grants a +1 item bonus to Stealth while you're holding it, increasing to a +2 item bonus if it has a +3 weapon potency rune.
Activate 
envision, Interact
Frequency once per day
Effect Attempt a melee Strike with the gloaming arc. On a hit, you slice away the target's shadow from its body and it must attempt a DC 30 fortitude save.
Critical Success The target is unaffected.
Success The target is Enfeebled 1 for 1 round.
Failure The target is Enfeebled 2 for 1 minute and Drained 1. The target doesn't cast a shadow until it is no longer drained.
Critical Failure As failure, but Drained 2.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
ForcefulThis weapon becomes more dangerous as you build momentum. When you attack with it more than once on your turn, the second attack gains a circumstance bonus to damage equal to the number of weapon damage dice, and each subsequent attack gains a circumstance bonus to damage equal to double the number of weapon damage dice.
SweepThis weapon makes wide sweeping or spinning attacks, making it easier to attack multiple enemies. When you attack with this weapon, you gain a +1 circumstance bonus to your attack roll if you already attempted to attack a different target this turn using this weapon.
EvocationEffects and magic items with this trait are associated with the evocation school of magic, typically involving energy and elemental forces.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
ShadowThis magic involves shadows or the energy of the Shadow Plane.