Jack Russell (Werewolf By Night)
Weapons	As a Werewolf he possesses superhuman strength, speed, agility,reflexes, and stamina. Has acute senses, a strong healing factor, and sharp claws and teeth. He is able to transform into his Werewolf form at will during regular nights and retain his human intellect, however when the full moon rises he involuntarily transforms into a mindless savage beast.
Origin	Marvel Spotlight # 2 1972
Activities	Lone wanderer, avid adventurer, member of The Legion of Monsters, and werewolf.
Service	Since his first transformation-present
Battle Status	Destined to meet Black Label Organization.

Jacob Russoff was the elder of two children sired by Gregory Russoff, a Transylvanian baron and scholar. Russoff's ancestor Grigori first brought lycanthropy (turning into a werewolf) upon the family when in 1795 he tried to rescue his wife, Louisa, from the vampire-king Vlad Dracula and was bitten by a female werewolf. Because his children were born before that event, Grigori's descendants did not immediately become werewolves themselves; however, the curse on the Russoff family only needed a catalyst to trigger it. In the mid 1950s Gregory Russoff, great-great-grandson of Grigori, acquired a copy of the Darkhold, which includes the secret origin of lycanthropy. By reading that passage, Gregory activated the curse and became a werewolf. He sent his wife, Laura, to her native America with their children for their own protection. Gregory was eventually killed by an angry mob.

Laura Russoff married again, to a man named Russell. Jacob Russoff became Jack Russell, and with his sister Lissa was raised in Los Angeles. When he turned 18, the curse struck him in turn and he became a werewolf. For about two years, Russell became a werewolf by night during the full moon. He took precautions to lock himself up, but sometimes the wolf escaped. During that time he never took a human life, although several of the persons he encountered were scarred or crippled. As a werewolf, Russell encountered Moon Knight, the Hangman, Sarnak, Doctor Glitternight, the Hunchback, Tigra, and DePrayve.

Mysterious beings known as "The Three Who Are All" partially lifted Russell's curse: he could change shape voluntarily at any time and retain his human intellect while in werewolf form. He became an occasional crimefighter, once encountering Iron Man in New York. Unfortunately, the curse still applied on nights of the full moon, when the wolf's mind supplanted Russell's. He designed a virtually escape-proof cell for those times.

Russell worked with Dr. Karl Malus, a medical researcher in L.A., to solve his problem. Malus instead used an experimental machine to subvert his will. The original Spider-Woman helped him escape, but a month later, he found that Malus's treatments had unintended consequences. He lost control over his transformations, and his werewolf form became even more lupine, with longer ears and snout, curved spine, and canine legs.

A devil-worshipping cult led by Schuyler Belial tried to capture Russell for use in a satanic ritual. If they sacrificed a werewolf and transfused his blood with theirs, they believed they would become werewolves themselves. For almost a year he fled from the cult. With help from Moon Knight, Russell finally confronted the cultists, and several of them died in the melee.

Returning to Los Angeles, Russell found that his werewolf side was becoming stronger each month. He contacted Dr. Michael Morbius for help, but he escaped and had to be subdued by the West Coast Avengers.

With more control of himself, Russell met Iron Man again while rescuing his sister from Morgan le Fay. He joined Dr. Michael Morbius's new team, the Midnight Sons. Jack Russell remains a reluctant adventurer, though, hoping that one day he can lift the curse. (From Marvel Database)