At the end of season 2 the Legends think they have caused the collapse in time. Little did they realise Felix Faust had been watching their adventures remotely. He planted a watcher spell on one of his followers i.e. Damien Dark and could see everything.

He used the Spears of Destiny’s power to create a dimension where time happens all at once. He would to do this so he could suck everyone’s souls out in one foul swoop, as his previous plans were blown apart by John Constantines friend ‘Chas’. (Quid Pro Quo, Season 1, EP10 of Constatine) The Legends now have also crashed in this dimension and to their dismay find the Wave Rider now longer can travel in time due to time happening all at once.

The most magical characters in the Legends i.e. Vixen and White Canary, partly because her soul was found by John Constantine (Haunted, Season 5 Ep 4 of Arrow) feel somethings wrong. White Canary keeps having out of body experiences as it later revealed her soul is being contacted by John Constantine for help. Vixens amulet keeps sending various animals to her as the animal’s souls are screaming for help.

Eventually they make contact with John Constantine and he explains that a powerful magician called Felix Faust has created this dimension in order to suck everyone’s souls from across time all at once. He used his a follower called Damien Dark and with the power of the Spear of destiny created this reality. To put reality right he must get a collection of magical items and use they collective power to separate time again. He needs transport (the Wave Rider) to get around and bodies to use as he states, ‘human shields’.

The Legends accept begrudgingly go along with Johns plan and go about getting the Wave Rider working again. Due to the severity of the damage they have to first find parts to fix the ship. Using both original and retro fitted parts i.e. (Easter egg/jokes about Back to the Future 3 DeLorean with huge circuit board).

Along the way throughout the adventure Felix Faust sends other magicians, demons and evil characters to try and thwart there plans.