Shaaan

Shaan the Serpent Queen was a nefarious archmage.

History
Shaan was a mysterious wizard woman with scale that once ruled a snake cult in Tashalar. She ended fought many times with Elminster Aumar. Once around 1340 DR the Company of Crazed Venturers fought Shaan in a small isle of the Sword Coast.

At last in an inter-dimensional place where Elminster met sometimes people from other Planes Shaan appeared trying to seduce the archamage Dalamar the Black from Krynn but El with the help of the archamage Mordenkainen from Oerth, that also had in the past an encounter with Shaan, used Ed Greenwood to imprison her in the Floating Helm of Tharados (an ancient Netherese unique magic item). Shaan resurfaced around 1487 DR and competed with other archmages for the possess of the Lost Spell during a spellstorm. Shaan at last was killed.