3) The Legends Release a Ton of Demons From Hell
This one’s an accidental consequence of the Legends not actively making a stupid decision, but it’s a screw-up nonetheless. After spending season three fighting the half-imprisoned demon Mallus, Sara has the bright idea that Mallus can only be destroyed once he’s fully free. This turns out to be true, and Sara, Nate, Zari, Mick, Amaya, and Wally West use the sex elemental Totems to form a giant Beebo which annihilates Mallus. Alas, the season finale ends with John Constantine interrupting the Legends’ vacation, informing them that they let loose a hell of a lot more demons than just Mallus (pun obviously intended). (Season 3, “The Good, the Bad, and the Cuddly”)
