Wrathwalker

"The Tal'darim wrathwalker robotics are now online, Hierarch."

- Rohana The wrathwalker is a colossus variant available in the single-player campaign of StarCraft II: Legacy of the Void.

Overview
The wrathwalkers are colossi that were found and reactivated by the Tal'darim. They had their thermal lances replaced with charged pulse blasters, making them powerful against priority targets.

Game Unit
The wrathwalker is one of three robotic siege units the player can use, along with the colossus and the reaver. Despite being a colossus variant, however, the wrathwalker is a very different unit in combat. Instead of the colossus's splash damage, the wrathwalker deals heavy damage to single targets, making it better for fighting smaller numbers of powerful enemy units instead of swarms of smaller units. Another key difference is that the wrathwalker can attack ground and air units, allowing it to be more effective against a mixed enemy force. However, it has a substantially higher cooldown than the colossus or reaver.

Wrathwalkers can be built by Alarak in Co-op Missions. They can attack air units through research.

Co-op Missions
Alarak is able to build wrathwalkers in Co-op Missions. Their ability to attack air units must be researched. Additional upgrades for them unlock at level 6.