Wail of the banshee

Wail of the banshee was a necromancy spell that killed several creatures.

Effects
The caster emitted a terrible scream that killed creatures who heard it, except for the caster. The more powerful the caster, the more creatures that could be effected by the wail.

History
This spell was not Netherese in origin, nor was it created by Sammaster as many necromancy spells were during his dark days. Its history was otherwise unknown.

Realmslore
Wail of the Banshee was a very rare spell in the Realms. Szass Tam likely knew this spell.