Agunea

Castlevania: Symphony of the Night

A strange but powerful weapon, the Aguen fires a small, nearly-invisible projectile straight ahead. Once it hits, the attack button can be held down, and multiple bolts of lightning will strike the target at the cost of 5 MP per bolt. It is an effective weapon against many bosses in Symphony of the Night, particularly the Succubus. Richter's item crash produces a large burst of electricity. There are four Aguens to be found in the game, spread across both castles. It has been described as a "lightning ring" and a "taser" by different people, although there is no definitive answer as to just what the Aguen is.