The mantle of an ancient Caller, Arachyr's Mantle provides the Witch Doctor with resistances to cold and darkness. It also adds Intelligence as well as Vitality which perfect for any aspiring intellectual! Finally there are some other goodies in here including Area Damage. Having Mantel will make your attacks do more damage over time regardless if they're physically present at their target. This item has cool down reductions so you can spam those skills without worry.
Level 70 stat ranges shown below.
+4 Random Magic Properties
“Arachyr was the first of the beasts created for this world. As such, he is father to all others.” -The Tomes of Creation