Origin

During World War I, Cyber served as Wolverine's commanding officer during his days in the Canadian armed forces. He has used the name "Silas Burr," but whether this is his actual name is unclear. Cyber eventually comes to murder a woman known only as Janet, whom Logan was involved romantically. After learning of her death at Cyber's hands, Logan attacks him and is humiliated. Cyber gouges out one of Logan's eyes, severely beats him and leaves him for dead. This is Logan's most traumatic defeat up to this point in his life and the resulting psychlogoical effects results in a subconscious fear of Cyber.

Sometime after WWI Cyber's skin becomes fused with adamantium through some unknown means.

Cyber resurfaces in Madripoor years later, where he interferes in the crime cartel of Wolverine's ally Tiger Tyger. Wolverine, eventually, manages to overcome his fear of Cyber in order to save Tyger's life, slashing his face and costing him an eye, and dumping him into a truck full of the powerful hallucinogens he had earlier used on Wolverine, leading Cyber to run screaming into the forest.

Cyber is next seen in Edinburgh, Scotland where he again engages Wolverine in battle. His intention is to kill Wolverine and then sell his adamantium skeleton. However, Cyber is unaware that the adamantium laced to Wolverine's skeleton has been recently removed by Magneto. Cyber is momentarily distracted as Wolverine extracts his bone claws, revealing what happened to the adamantium. Wolverine takes the opportunity to slash Cyber across the face. Cyber quickly slams Wolverine to the ground and uses his foot to snap off the bone claws set in Wolverine's right forearm. However, he is eventually outwitted and captured by Wolverine and Excalibur at which point he is turned over to S.H.I.E.L.D.

Cyber is broken out by a group called the Dark Riders, who manage to later kill him and harvest the pure adamantium from his skin.

More recently he has resurfaced in astral form, making himself known to a young mutant with child-like intelligence named Milo. Milo has super strength, and Cyber seems to plan to take control of this mutant's body. He will then again go after his nemisis, Wolverine. He has contacted Wolverine's son, Daken, to help him do this, but identified himself to Daken only as "an old friend."

Abilities

Most of Cyber's body is virtually invulnerable to physical injury. Cyber's adamantium skin has proven able to withstand all attacks against it, even by weapons composed of adamantium itself. Housed within each of Cyber's fingers is a single, retractable, adamantium claw. Each claw is tipped in powerful hallucinogens or toxins that have proven capable of affecting Wolverine, before his mutant healing powers filter them out. The potent toxins are specifically designed to affect Wolverine and are fatal to ordinary humans within seconds.

Cyber also possesses an enhanced healing factor similar to that of Wolverine that enables him to survive the process that grafted adamantium to his skin. However, Cyber's healing power, while similar to Wolverine's, isn't nearly as efficient. It is interesting to note that his mutant healing factor has not allowed him to heal from a serious heart problem he has experienced all his life.

Cyber's final ability is an unusual psionic ability that allows him to track brain patterns across great distances.