The Magic Thief

After a child has first presented their magic in the supermoon ritual, they are often told of the dangers that can happen if they try and use too much magic too quickly. This is often posed as a cautionary tale/ urban legend type horror story to help keep the children weary of their magic ability. Practically it helps dissuade them from trying a spell that is too complex and could potentially harm them or those around them as they’re adjusting to using magic more regularly.
The tale is:
When the sun is setting and the moon is rising, before either can claim the protection of the earth is when the Lleidr Hud’s roam the earth looking for food before its banished away by the moon. These creatures are a black smoke that rolls over the ground until it can find it’s feast. Once it’s has its first course the smoke of its body gets stronger and thicker, choking anyone brave enough to fight its writhing mass, tendrils of smoke as thick as branches feeling its way until it finds an unsuspecting meal.
The meal it is looking for is always children, children who whilst playing outside in the evening sun, after all their chores are done before they’re called in for bed, are using magic. Any children playing a game of tug of war with their abilities or even making fire dance on their palms, it will find them. Little Wynn who was outside moving a stone around practising his skill barely a shout away from his front door, didn’t see the Lleidr Hud when it formed behind him the black smoke forming a wall between him and his safe home. His parents did though as they were about to call him in to get ready for bed, before they could scream the Lleidr Hud had wrapped its smoky grasp around his face sucking the magic out of poor little Wynn, his child body defenceless against the monster taking his force get stronger on each breath. Only when it had finished it meal did it let go of him, dropping the clothes he was wearing onto the grass below, whilst what was left of Wynn got caught in the wind and scattered across the field. By the time his parents had reached him the black mass was rolling away over the grass to look for its next meal, uninterested in the adults screaming at it.