Oftentimes, one will find ghoul queens able to summon nasties. Like the vampire mage, they are not covetous, and so will not warp away after being hit a few times. Their dual spellcasting attacks make them quite dangerous, as they are quite able to quickly fill the level with nasties. Even in melee combat they are dangerous, as they are quite likely to curse your items. An artifact weapon that does double damage against them is advisable; in general, the large number of undead spellcasters in SLASH'EM makes Sunsword quite an appealing weapon, for those who can obtain it.