Alarak is a commander in the Co-op Missions mode of Legacy of the Void. Alarak personally takes the field as a hero unit similar to Kerrigan and Zagara. In addition, he has the ability to field powerful Tal'darim units, and call down the Death Fleet to annihilate his foes. Alarak was made available with the release of Patch 3.6 (14th September) and can be unlocked for $4.99 USD.