They're ghostly evolit that came from deceased water evolits , they often wander on cemetery and scare people for fun
Over the years of training, Whirlhell has managed to develop his magic to such a level that he can manipulate the blood of other creatures for his own benefit, using his wand on his head at full strength. Working together with their heads on their stomachs, they are able to use their strength to the fullest and this event was called 'Night of the Bloody Moon"