HotS: Unlock Zeratul (Hero)
You will be provided with a key that unlocks this hero on Heroes of the Storm.
Use it on this page: link
The enigmatic Dark Templar Zeratul serves the Xel'Naga. While he expertly wields the power of the Void, it is his wisdom that earns him the respect of the Koprulu sector's leaders - despite his penchant for dramatic entrances.