 In 1989, three Black Knights-style figures were included in the 6060 Knights' Challenge set.Two more Black Knights-style sets were released in 1990; one was the 6059 Knights Stronghold town gate set that featured one mounted knight, four soldiers, along with a big catapult, and 6034 Black Monarch's Ghost, a set that included a lone mounted knight and a glow-in-the-dark ghost.Like the 6081 King's Mountain Fortress, Knights Stronghold and Black Monarch's Ghost featured the newly invented helmet visor and armor breastplate pieces for the mounted knights.