From Dark and Darker Wiki
Spider Mummy
Enemy
Damage
12/15/20
Health
40
Movement Speed
0.93/0.98/1.05
Experience
0
Adventure Points
0
Location
Description
Spider Mummies spawn from a Spider Jar, only 3 spiders can be active per jar. Spider Jars spawn an infinite amount of spiders until they are shattered.
Nightmare: Applies a stacking debuff (5max) that reduces Utility Effectiveness by -150 for 7s. Note that Utility Effectiveness is not yet implemented in the game.
Loot Table
Spiders do not drop loot, but the location where they spawn will drop loot. Please check Spider Jars page.