Like other mummies in the Heroes series, they can curse targeted creature stacks, dropping their attacks to do the bare minimum of possible damage. This can be used by players with great tactical success. One should focus on creature types that have a big damage range as this will force them to lose a huge amount of their usefulness. At the same time, creatures with no damage range, such as the game's Angels, the curse will be completely useless. See the article on Mummy (H3) on Fandom's mightandmagic wiki.