The Mandrels are dangerous predators first introduced in Nightmare of Eden. They are humanoid creatures native to the planet Eden. Mandrels have large, almost clam-shaped heads with glowing green eyes and small tendrils around their mouth. They have green, leathery skin, but they also have black fur down their back and around their arms. They have three long fingers on each hand, which are tipped with sharp claws. Mandrels mainly hunt by sound and can hear into the ultrasonic.
Mandrels are dangerous predators, able to easily kill a human. Mandrels are absurdly tough, and are able to survive repeated laser-blasts. The only known method to kill a Mandrel is to electrocute them. Luckily, they aren't especially intelligent and can be easily fooled.
Mandrels have the unusual characteristic that they decompose into Vraxoin when they die.