The first Nemesis, St. Ives, witnessed her father, Deadly Ernest, accidentally killing her mother. She swore to avenge her mother, and used science and magic to create the sword.
The second Nemesis, Thorne, first appears as leader of the team Gamma Flight, the team created to replace Alpha Flight.
The third Nemesis, Weatherly, originally lived in the 19th century where she was the mistress of Centennial. She was killed but later revived by the promethium soulsword, Scell. Technically still dead, if Scell is removed from her proximity, Nemesis' body ceases to function.
Isabel St. Ives was created by John Byrne, and first appeared in Alpha Flight volume 1, #8.
Jane Thorne was created by James Hudnall, and first appeared in Alpha Flight volume 1, #76.
Amelia Weatherly was created by Scott Lobdell, and first appeared in Alpha Flight volume 3, #1.
Major Story Arcs
Isabel St. Ives
The first Nemesis assisted Alpha Flight members Aurora and Northstar in their battle with Deadly Ernest and cut her father to pieces, disappearing afterward. Deadly Ernest was revived by Scramble and managed to kill most of the Alpha Flight team when Nemesis returned, and kept the team alive through the life forces of Ernest's previous victims, long enough for Puck to kill him again. Nemesis disappeared finally after that.
The second Nemesis, Thorne, once led a cult called The Children of the Night. She led Gamma Flight and was a member until it was disbanded, and later Alpha Flight when that team was reinstated. When Carcass got loose, Shaman summoned heroes to kill him; Nemesis was one of those he summoned. Alpha Flight disbanded once more, and her whereabouts are unknown.
She was recruited by Sasquatch for a strike force to save Alpha Flight. After their rescue from the Plodex, the team agreed to stay together.
An old enemy of Alpha Flight, Flashback, showed up swearing he'd reformed but, claimed he was out of time, and wanted their help in fixing the timeline. With her time-traveling capabilities in the sword, one by one she "killed" Flashback and the members of Alpha Flight to send them back in time, each death messing up the timeline even more. Finally, she killed herself, hoping that this would fix things. The timeline was eventually restored, but since her second death, the whereabouts of Nemesis and the Scell are unknown.
Powers and Abilities
All of the women who bore the name Nemesis were unpowered humans whose abilities were granted by the magic sword.
Equipment and Weapons
Nemesis carries The Onyx Sword. The blade is less than an atom thick in width and is capable of cutting between molecules. The Onyx Sword can cut through almost anything and is indestructible. It also grants the wielder certain powers such as the ability to fly, teleport and absorb life force through the blade.