These serpentine constructs were made of articulated bronze rings. Their eyes glowed a bluish-white and their powerful jaws dripped with electrical sparks. They typically measured 20 feet (6.1 meters) in length and weighed around 1,000 pounds (450,000 grams).
Their bodies were immune to harm from electrical attacks, immune to spells that affected the mind, and could see in areas of total darkness out to a range of 60 feet (18 meters). Furthermore, electrical attacks made on a bronze serpent would heal its body.
Bronze serpents typically concentrated initial attacks on those that appeared most vulnerable to their fangs. They attacked by grappling and constricting the bodies of their enemies, then biting with their electrical fangs.
As constructs, they had little to no effect on their surrounding environment, and could be found in any land ecosystem.
Bronze serpents could be created from 1,000 pounds (450,000 grams) of bronze by a caster of above-average skill who could cast arcane spells. The creation process also required use of the spells geas/quest, limited wish, polymorph any object, and shocking grasp.
These serpentine constructs were originally created in tropical lands to guard the temples of serpentine deities. Over the centuries the secrets of their creation spread, making it possible to see them almost anywhere in the Realms.
- Expedition to Undermountain
- Ed Bonny, Jeff Grubb, Rich Redman, Skip Williams, and Steve Winter (September 2002). Monster Manual II 3rd edition. (TSR, Inc), pp. 40–41. ISBN 07-8692-873-5.
- Eric L. Boyd, Ed Greenwood, Christopher Lindsay, Sean K. Reynolds (June 2007). Expedition to Undermountain. Edited by Bill Slavicsek. (Wizards of the Coast), p. 30. ISBN 978-0-7869-4157-5.