Ethniu

Notes:

 * Spawns around (K-7) Map 2
 * Will despawn after a wipe, so be careful.
 * Uses Draw-in.
 * Has both En spell damage and additional effect Silence.
 * Spam Cast's Aeroga III, Graviga, Silencega, Tornado, Aero IV, Hecatomb Wave, Zephyr Mantle, Frightful Roar.
 * Weaponskills: Evisceration, Gust Slash, Cyclone.
 * Re-spawn seems to be 6-10 hours.

Historical Background
In Irish mythology, Ethniu (Old Irish pronunciation: [ˈeθʲnʲu]) or Eithne (Irish: [ˈehnʲə]; also Ethliu, Ethlinn, and a variety of other spellings) is the daughter of the Fomorian leader Balor, and the mother of Lugh.