You gain a +1 to your Dexterity stat and a resistance to necrotic damage. If Zyfang is also attuned, the weapon gains a +1 to hit rolls and damage. 

Notes: Bonus: Dexterity Ability Checks, Resistance: Necrotic, Put the ring on, if you have Zyfang attuned this ring cannot be taken off until Zyfang is unattuned. , Warding, Jewelry