While attuned to this weapon you gain a +3 to attack and damage rolls made with this weapon. When you hit an extraplanar creature, such as aberration, celestial, elemental, fey, or fiend it takes an extra 3d6 damage. Additionally, if you kill a creature that would normally return to its home plane upon death it instead stays on the same plane as you and dies. 

A yklwa (pronounced YICK-ul-wah) is a simple melee weapon that is the traditional weapon of Chultan warriors. A yklwa consists of a 3-foot wooden shaft with a steel or stone blade up to 18 inches long. It costs 1 gp, and it deals 1d8 piercing damage on a hit. Although it has the thrown weapon property, the yklwa is not well balanced for throwing (range 10/30 ft.).

Notes: Bonus: Magic, Damage: Melee Weapon Attacks, Damage, Combat, Thrown