The Silver Scorpion is a vicious little creature that can be found hiding inside human skulls, especially ones left discarded on the Ape-Ball's world. They are normal-sized scorpions that just happen to be made of silver. They're nearly unkillable and one strike from their deadly tail can kill. Xaq first encountered the creatures on his trek across the Ape-Ball's world. They killed him repeatedly, and in the end all he could do was avoid the things. (Series 2: "Xaq to the Future")