HotS: Unlock Jaina (Hero)
You will be provided with a key that unlocks this hero on Heroes of the Storm.
Use it on this page: link
Jaina Proudmoore is a master spellcaster, trained by the legendary Archmage Antonidas himself. Brilliant, courageous, and wise, it was Jaina who led the survivors of the Scourge of Lordaeron to safety. But don't mistake her graciousness for weakness, or she will gladly demonstrate to you the folly of picking a fight with a sorceress.