Assassin bug

An assassin bug is a new insect in SLASH'EM. Although they can be seen randomly generated, they are most often summoned by the summon insects spell that priests and devas cast.

Strategy
Along with the stronger migos, killer beetles are a major reason that one cannot just ignore the summon insects spell and use it solely as a buffer, as is possible in vanilla NetHack. Killer beetles are very fast, with a speed of 24, and are more than capable of dealing large amounts of damage, particularly to a character who is focusing on the priest next to them. A good strategy for dealing with summon insects is to take out the migo warriors, killer beetles and assassin bugs, and let the rest of the serve as a buffer.