Tobi commissioned this ring to greatly heighten his ability to do his job. It grants him the ability to move freely in all manner of difficult terrain, escape bonds & grapples with ease, have limited teleportation abilities, and even become invisible for a time! 

Notes: Bonus: Dexterity Ability Checks, Invisible, Negates Difficult Terrain, Magical Speed Reduction, Immune: Paralyzed or Restrained (Magical Sources), Movement, Warding, Jewelry