Thunder Beast Slizer Evolves From: Jet + Amazon + Granite + Electro Evolves To: Unknown. Throwbot Mode: None. Beast Mode: Uintathere The thunder beast slizer was produced when the Ultrarex team attempted to evolve before collecting the nescessary disks.  The result was a large, primitive creature with no throwing function. A special neck function is shown in the bottom photo.  When the head is turned to one side, the legs swing forward and back as if the animal were walking.  (Try building this!!!!) When attacking an opponent, both legs swing back and the horns swing forwards.