Minus Curse

The Minus Curse is the one that influences the Spirit World into being instead the Minus World.

Its known that once long when the Kasudo Needle first appeared, somehow every duel monster spirit became kids or at least occured to the inhabitants of the town that Luna stumbles upon. Also because of the Kasudo Neddle weapon others were instead turned into stone and then captured.

This curse is being influenced by none other than Monkey King Zeman who currently rules this world. Thus because of this curse turning spirits into stone, is that this could be the main reason behind of what truly ocurred to Ancient Fairy Dragon herself from the beginning.