As Hellcat tried persuading Valkyrie to go with her to a disco, an other-dimensional sorcerer named Lambert opened a magical portal to transport Hellcat from Earth to his homeworld by way of the Shadow Cloak (borrowed from Devil-Slayer in Defenders #60).
On a hunch that She-Hulk was key to saving his ever-shrinking world from obliteration, Lambert reinstated Hellcat's psionic abilities (lost when Moondragon absorbed Hellcat's psionic energy to replenish her own strength in Defenders #77) and convinced Hellcat to use the Shadow Cloak to bring the green heroine into his realm (Savage She-Hulk #13-14).
But Lambert's subatomic universe now metaphysically existed within She-Hulk's own bloodstream, so summoning She-Hulk left her trapped within a paradoxical vortex. There she encountered Man-Wolf (Stargod of the other realm) and eventually used his mystical gem to save the dying worldand return both herself and Hellcat safely to Earth.
Hellcat invited She-Hulk to join the Defenders, but she declined membership at that time. As for Valkyrie, she eventually accompanied Hellcat to see disco singer Dazzler.