Spectre

Spectres are a type of elven ghosts. Often considered to be the male counterparts to banshees, they retain many of a typical banshee's abilities, but are much rarer. Most are found on the Broken Isles.

Mogu Spirits
Likely due to their own dark magic, the souls of many mogu have been twisted into forms similar to Spectres, and also share characteristically disturbing wails.