Curse of Da Bad Moon

You throw the talisman into the air and points at a location within range. A cackling, evil laughter can suddenly be heard in a 300 feet radius, centered from where da Bad Moon is summoned. From the location the caster choose a large, green, grinning and fanged ball of crackling energy emerges and starts to bounce and bite all creatures within range! This grinning ball of energy counts as a large creature which coveres a 10 feet radius, is immune to all damage and constantly shoots out green-lightning at all creatures within 10 feet of it. All creatures within range of this ball must make a Dexterity saving throw at the start of their turn if they occupy the same space of the ball, enters it`s space or are within 10 feet of it, suffering 3d8 Bludgeoning, Piercing or Lightning damage, depending if the ball is biting, bouncing or shooting green-lightning. Creatures within the same space of the ball will have their movement halved.
This crackling ball last for the duration and is controlled by the caster, whom can as a bonus action move the ball up to 60 feet.
Should the concentration be broken, the ball will then bounce in a random direction up to its maximum movement and disappear.

At Higher Levels. Casting this spell as a 5th level spell increases the size of the ball from Large to Huge and increases the damage done by 1d8. Casting this spell as a 8th level spell increases the size to Gargantuan and damage dices from d8s to d10s and damage done by 1d10 (a total of 5d10).