Storm's Companion is a Druid Unique Pants that gives you Wolves Lightning damage and makes them cast Storm Howl. Like all Unique items they provide a powerful effect that can't be found on any other item. These effects can't be moved around like Legendary Aspects resulting in limited flexibility when incorporating them into your build.
How to Obtain - Random Drop
Rarity - Normal
Storm's Companion Mechanics
Many Unique items change the way skills and builds work in significant ways.
The active ability of Wolves is replaced by Storm Howl, a small AoE attack that deals Lightning damage.
For further information, see our Build Guides & Unique Item Wiki
Storm's Companion