This originated from a fandom headcanon about what would have happened if Hordak got to face Entrapta on the battlefield, back in season 4 when Entrapta had been sent to Beast Island by Catra, and Hordak believed she had betrayed him and the Horde. The idea was that Entrapta was going to show up at some point and Catra was going to attack her to silence her, and then pandemonium ensues.