For Mylena Drunningskaur, some possible antagonists could include:

1. The Dark Wizards: A group of powerful and malevolent sorcerers who seek to overthrow the kingdom and enslave its people.
2. The Shadow Army: A mysterious and terrifying force of undead warriors who are controlled by the Dark Wizards and who seek to spread destruction and despair throughout the land.
3. The Obsidian King: The leader of the Dark Wizards and the mastermind behind their plots. He is a formidable and ruthless opponent, with a powerful magical arsenal at his disposal.
4. The Witch Queen: A former ally of Mylena's who has turned against her and who seeks to claim the throne for herself. She is a skilled and cunning manipulator, with a powerful magical ability and a vast network of spies and agents at her disposal.
5. The Unseen: A shadowy and secretive organization that seeks to overthrow the kingdom and bring about chaos and destruction. They are known for their stealth and their ability to operate in the shadows, and they are feared by all who know of their existence.