Review for LEGO set 2505 Garmadon's Dark Fortress from Brickipedia
“The set contains a fortress made mainly out of black, grey, purple, and white pieces, with some red, has a brown drawbridge, and is armed with flick-fire missiles. It also includes Lord Garmadon's throne which doubles as a flying machine and a giant skeletal underworld... More spider that attatches to the fortress. Other Minifigures include Kai, Nya, Samukai, Chopov, and Bonezai.”
Full review at brickipedia.fandom.com