https://www.pcgamer.com/wows-infamous-alterac-valley-battleground-is-coming-to-heroes-of-the-storm/

The next Heroes of the Storm in-game event will pit the forces of the Horde and the Alliance against one another in a battle for heroes, portraits, banners, and mounts called Echoes of Alterac. The event will unfold on a new battleground, Alterac Pass, a three-lane map in the mountains inspired by World of Warcraft's Alterac Valley, and will see the Draenei finally join the action in the Nexus with the addition of a new hero, Yrel. 

Yrel brings three primary abilities to the battleground: Vindication, which damages nearby enemies and heals her; Righteous Hammer, which deals damage and knocks enemies back; and Avenging Wrath, a jump-in attack with area-of-effect damage that slows her opponents. Her Heroic Abilities are Ardent Defender, a barrier that surrounds her for three seconds, absorbing all incoming damage and healing her for half of that amount, and Sacred Ground, which grants her a bonus 40 armor as long as she remains with its area of effect. Divine Purpose, her Hero Trait, enables Yrel to instantly charge her next basic ability at no mana cost, and passively enables her basic abilities to charge up over 1.5 seconds, at the cost of reduced movement rate.