Frostbite Spider ( Skyrim ) Frostbite Spiders are creatures in . They exist in several varieties and can be found throughout Skyrim ' s wilderness , as well as inside dungeon s and mines ( such as Redbelly Mine ) . They are also one of many insects ( although they are technically arachnids ) found living in Skyrim . Frostbite Spiders are always aggressive and will attack almost anything on sight , with the exception of Lis . They will spit poisonous venom from afar during combat , which can be harvested and used on weapons after they are killed . Upon attacking , they will make a screeching or scuttling noise . They attack with their mandibles and legs when up close . Frostbite Spiders ' health and strength depends on the size of the spider . Their lairs are often strewn with webs which they can use to descend upon their unwary prey from above . Some of the egg sacs located within the lairs of Frostbite Spiders contain Spider Eggs , which are an ingredient used in alchemy . Dungeons containing Frostbite Spiders often have webbing around their entrances . Inside , webs frequently contain the desiccated corpses of creatures and adventurers . These webs may also hide chests , urns , or passages . While some can simply be walked through , others must be cut or burned away in order to proceed . While they are usually the sole inhabitants of their residences , Frostbite Spiders will occasionally share an abode with Vampires , Falmer , or other creatures , whom they are friendly with . Types . Frostbite Spider . Four sub - types of standard Frostbite Spiders exist , each with different amounts of health . They stand roughly as tall as a wolf , and commonly appear in small groups . Wounded Frostbite Spider . A single wounded Frostbite Spider appears in Bleak Falls Barrow . Its size and abilities are both slightly less than those of Giant Frostbite Spiders . Another one may be found in Ysgramor ' s Tomb , along with one in Dimhollow Crypt once is installed . Although rare , they may appear when fast traveling to Riverwood . Giant Frostbite Spider . Giant Frostbite Spiders are a considerably larger , more fearsome breed of Frostbite Spider . Standing slightly taller than the Dragonborn , they are most commonly found in caves . While Giant Frostbite Spiders do not live together , they are often accompanied by several minor Frostbite Spiders . When the Dragonborn reaches higher levels ( around level 40 ) , they become more common inside dungeons , especially those occupied by witches and hagravens , and it is not impossible to find two in the same room . At higher levels ( mostly above 80 ) , they are frequently found in the wild . Ironically however , they do not become more common inside spider nests at higher levels . Two sub - types exist , with differing amounts of health . Lis . Lis is a somewhat domesticated spider kept by Gabriella in the Dark Brotherhood Sanctuary . She is friendly and will not attack Dark Brotherhood members unless provoked , or if the Dragonborn chooses to destroy the Dark Brotherhood . If Lis is killed or attacked in any way by the Dragonborn , it counts as attacking a Dark Brotherhood member and the Dragonborn must pay a fine .