She is a powerful, red haired, amazon-like warrior, or Femizon, from a matriarchal, technologically advanced future timeline where men have been subjugated by women.

I asked John Buscema to give her a bandolier around her torso because a number of women's-lib types were wearing them (sometimes with real bullets) in photos in newspapers and magazines.

Thundra is renowned as the United Sisterhood's most formidable warrior, having been physically enhanced by genetic engineering and trained in combat and tactics from a young age.

She is sent to the 20th century to challenge Fantastic Four member the Thing to a bout of one-on-one combat, believing him to be the strongest male of all time.

She battled the Thing in personal combat, and then wound up ultimately switching sides and helping the Fantastic Four defeat the Frightful Four after she quits that group.

The Grapplers were assigned to trick Thundra into helping them sabotage Project Pegasus, a prison/research facility built for housing supervillains.

[13] As a result of the deception by Roxxon and the Grapplers, Thundra came to blows (yet again) with the Thing (in whom she has expressed a romantic interest, on more than one occasion).

[17] She later abducted the Avengers and Fantastic Four to the future to enlist their aid in defending Femizonia from the extra-dimensional warlord Arkon and his warriors from Polemachus.

[17] Medusa and Crystal infiltrate Thundra's present-day homeland to retrieve part of a device required to rescue Black Bolt from the Skrulls.

As tensions between the two disguised women boil over, Thundra appears and compels them to undertake the ritual combat required of the society to resolve the disagreement.

[19] Thundra, Sue Storm and Valkyrie team up with She-Hulk and her Skrull partner Jazinda (masquerading as a Shi'ar) to forcibly distribute stagnating aid in the corrupt country of Marinmer.

Thundra is also a skilled combatant with a sword or her three-foot linked chain, the latter of which is her weapon of choice, often attached to a bracelet on her left forearm.