Glowing balls are a monster-only spell used by both druids (Keethrax and Guth'Alak), all varieties of liches, and skeletal kings, including the one faced in the lowest level of the Tomb of the High Kings. In-game it appears as a blue "*", and on miss or hit, respectively, is described as "You barely avoid a magical barrage." "You are hit by a barrage of glowing balls!" "You resist the searing flames." The barrage of glowing balls thus is a fire attack. PC-cast Magic Missiles are one of the few types of magical offense that cannot be resisted partially or completely.