“We are going to find out shortly on Legends of Tomorrow just how this Eobard links into the Eobard from The Flash: Where he’s coming from, and more importantly, where he’s going to after this.”
The object is said to be able to alter reality, a concept that seems to be spreading throughout the DCTV timeline.
[Contains spoilers for Legends of Tomorrow season 2!]
After Barry Allen severely changed things during Flashpoint, more of the consequences of his actions on The Flash are trickling their way to the other CW series’.