Dark champions of Necropolis.

They are worth the money; they are not the worst unit in the game.

Believe me, Menti, they are not worth the money or the dark energy, despite their menacing appearance and heartbreaking name. They can still be used in battles with small armies, but in the late game, they become cannon fodder. Fortunately, there are banshees, which, in my opinion, are much more useful; otherwise, the game would be severely unbalanced.