Coldworm the Burrower

Diablo II Notation Basic Class Skill Item Ally Quest Area Monster Tale Animal Construct Demon Undead Champion Unique Super Boss Evil Alphabetical Act 1 Act 2 Act 3 Act 4 Act 5 Creeping Feature Bloodwitch Beetleburst Coldworm Dark Elder Fangskin Fire Eye Ancient Kaa Coldworm the Burrower is a Cold Enchanted Magic Resistant Super Unique Sand Maggot Queen guarding the chest containing the Staff of Kings in the Maggot Lair Level 3 under the Far Oasis in Act 2. She has no minions but she regularly spawns Sand Maggots, which are Immune to Poison (100%) in Hell. She cannot be poisoned or cursed, and becomes Immune to Cold (115%) and Immune to Poison (120%) in Hell (although the latter is redundant).