As of patch 2.4.2, it gained a unique legendary affix (as a free seventh property). It works similarly to Zei's Stone of Vengeance: Lightning damage taken by an enemy is increased based on distance to the Wizard at the moment of the damage being resolved at the moment of inflicting it (not at the moment of cast). As such, it is most useful for the kiting builds, and synergizes well with Halo of Karini or Power Hungry.
The damage buff is capped at 60% at 40 yards, but works at any distance past that limit: it will just not grow any further beyond that range. Damage increase is multiplicative to other similar effects.
Stats (Level 8)Edit
Crafted around a shard that fell from the sky during the Festival of Lights.