The Const.World.Spawn.BarbarianKing has Body = "figure_wildman_06". However this particular figure does not exist in the vanilla brushes. In fact, the correct sprite to use is figure_wildman_04. Vanilla has avoided this bug so far because in the barbarian_king_contract the party that is spawned for the barbarian king is manually given the figure_wildman_04 sprite. However, if at any time vanilla would try to spawn the Const.World.Spawn.BarbarianParty without manually setting its Body, it will result in a bug because it will try to find figure_wildman_06 in the brushes which does not exist.