Mechanicum Battle Group, First Release Year: 2024. Material: Plastic. Factions: Imperium Armies. (Unpainted) (New on Sprue) -- Unleash the power of the Cult Mechanicum with the Mechanicum Battle Group for Warhammer: The Horus Heresy. Dive into the Age of Darkness with this comprehensive set of 29 miniatures and discover the technological might of Mars.