#LeagueOfShadows is a special comprised of the forty-third and forty-fourth episodes of Season 1 of DC Super Hero Girls.
Kara tells the Super Hero Girls and three of the Super Hero Boys at the secret base about the band League of Shadows performing at the Lazarus Pit club. Karen tells them about the band Up Past 8 and says she has tickets to their concert. Kara says she'll take Karen to the League of Shadows live show, and gives her a makeover. At the show, Kara is invited backstage where she meets Ra's Al Ghul and the band members of League of Shadows. Ra's gives Kara the "Demon's Fang", a red, glowing guitar pick. Later, on stage, Ra's sings Kara a song whose lyrics say the Demon's Fang will make the listener obey Ra's. Karen returns to the secret base and throws away her makeover clothes, returning to her old self. Kara arrives at the secret base with red irises wearing the Demon's Fang on a choker. She disrupts all the other girls and boys at the base and flies away. Karen notices her tickets are missing and suspects Kara took them. She follows Kara and sees her using the tickets to get into the Up Past 8 concert. Karen spots Ra's at the concert and hears him telling his acolytes that he controls his new weapon with "a stone from outer space." Karen uses her wrist computer to analyze the Demon's Fang, and it says it is from Kryptonian origin, and that red kryptonite causes, among other things, "susceptibility to mind control" in Kryptonians. Karen uses her wrist computer to call for help. When the lights turn on, the boys on stage are Barry, Hal, and Garth, dressed in the white Up Past 8 clothes, while Karen ties up the three actual band members backstage in their undergarments. The boys sing Let Me Save You with My Love while Kara attacks them repeatedly. Karen says Supergirl's got the mind-control song stuck in her head and "the only way to get it out is to hit her right in the heart." They sing about snapping out of Ra's influence and after the Super Hero Girls hug Supergirl, Ra's retreats and Supergirl lands on stage and starts dancing to the song.
When this episode was announced, it was originally going to air on May 17, 2020, but was removed from the schedule for unknown reasons.
This episode was referenced in the short "Booked" in a text on Kara's phone.
The plot of this episode somewhat resembles that of My Little Pony Equestria Girls: Rainbow Rocks, which is based on My Little Pony: Friendship is Magic, a franchise in which Lauren Faust was involved.
This is Ra's Al Ghul debut.
Although this special consists of the forty-third and forty-fourth episodes, they are the thirty-fifth and thirty-sixth in production order.