Umbala Minions

During the fantasy medieval age, there is a kingdom, named Operus. This kingdom is having it's golden age. The people are happy without worrying anything. But this kingdom's golden age will soon come to an end. The king named Ops made a mistake. He angered a powerful wizard and made the colourful kingdom colourless.
The king sends out his legion of colourful soldiers to stop the evil wizard. To protect his castle, the Wizard sends his Umbala minions. Their goal is to prevent soldiers to reach the castle while the tower is absorbing all the colours in the kingdom. The future of him is in your hands.