Slithraa (pronounced "slith-raa") is the former general of the Hypnobrai Serpentine tribe and a minor antagonist in Frank's Adventure of Ninjago. Slithraa originated from the television series Ninjago: Masters of Spinjitzu.
Ninjago: Masters of Spinjitzu
Slithraa is the first of the Serpentine to appear in the series when Lloyd Garmadon discovers the Hypnobrai tomb. Slithraa finds Lloyd and tries to hypnotize him. However, Slithraa accidentally hypnotizes himself by looking at his reflection in the ice and falls under Lloyd's control, putting the entire Hypnobrai tribe under Slithraa's new demands of serving Lloyd. Slithraa later raids a village with Lloyd and the rest of the tribe for candy and retreats when the ninja attack. Slithraa later returns in the second episode when he orders the tribe to help construct a tree house for Lloyd. This leads to his former second in command Skales stealing the Hypnobrai Staff and becoming general of the tribe after Slithraa loses to him in a Slither Pit battle.