Kaldalis is available as a hero unit to Fenix in Co-op Missions. He can be researched at the Purifier conclave, and from there will commandeer a legionnaire body. The legionnaire will gain enhanced stats, as well as a leaping charge and a cleave attack. After Kaldalis is killed, he will instantly transfer to the next nearest legionnaire.
Just like Kaldalis himself, the Kaldalis purifier has only one eye active in its profile. However, the missing eye is reversed; Kaldalis was missing his left eye, the Kaldalis purifier is missing its right eye.