lesser extent, Captain America and Spider-Man. The character was created by Stan Lee and Don Heck in Journey into Mystery #98 (Nov. 1963) in which he first battled Thor.His next appearance (Journey into Mystery #105–106 (June–July 1964)) saw him team up with Mister Hyde for the first time (with Hyde being the brains of the team) and the duo had a few more encounters with Thor before their first battle with Daredevil in Daredevil #30–32 (July–Sept. 1967). Fictional character biography Klaus Voorhees Klaus Voorhees was born in Rotterdam, the Netherlands. Klaus was an ex-convict and the Dutch laboratory assistant to Professor Schecktor, a scientist working in India and looking for a cure for venomous snake bites. Unsatisfied with his lower position, and intent on stealing Schecktor's discoveries, Voorhees killed Schecktor by using a cobra. In order to make himself look less guilty, Cobra let the cobra bite him as well. He used an experimental anti-venom for snake venom to cure himself, but denied it to Schecktor. The cobra was radioactive due to experimentation and in a process similar to that which granted Spider-Man his powers, Voorhees gained superhuman abilities similar to a cobra's. Thor's mortal form Don Blake had encountered Schecktor. As Thor, he met the dying man and learned what had happened and that Cobra was traveling to America. Cobra attempted to manufacture a cobra-serum to transform others into similarly-powered slaves, but was thwarted by Thor. Although Cobra escaped using Jane Foster as a hostage. As the professional criminal called Cobra, he fought Thor, Daredevil, and a number of other superheroes. Cobra and Mister Hyde were partners for years. They first joined forces to get revenge upon Thor, but were jailed. Cobra and Hyde were then bailed out and employed by Loki to kidnap Jane Foster, and Loki doubled their powers. Thor followed them to a house where traps had been set up for him. Hyde was defeated and then Thor manipulated the power supply of the house. Using his hammer, he sent a charge through the house that electrocuted Cobra. The weakened Cobra was forced out of a pipe next to Thor. He was easily defeated by Thor and left bound, before being arrested with Hyde. Cobra and Hyde then battled Daredevil for the first time. He later teamed with Hyde and the Jester against Daredevil. Cobra later joined the original Serpent Squad with Eel and his brother