In book three of the wheel of time The Dragon Reborn chapter 23 Sealed the aftermath of Egwenes trip through the accepted testing ter angreal is detailed.
We find out that while she was inside the ter angreal something went wrong and she quite possibly almost died. It is implied several times throughout the chapter that this was because of a resonance between the testing ter angreal and the dream world ring ter angreal just given to Egwene by Verin. We also are told that once before when Aes Sedai used two vaguely similar ter angreal in the same room that it destroyed both of them and harmed the Aes Sedai who were present.
We find out much later in the story that
Verin is Black Ajah
Is there any other evidence to suggest that this (the giving of the ring immediately before the examination) was a deliberate attempt to kill Egwene by the aforementioned character?
Note: I think there is little reason to doubt that Verin knew that the ter angreal could cause each other to react in such a way. It is mentioned by either Alanna or Sheriam about the only other case of this happening so it seems to be common knowledge. Not to mention that Verin was a brown who pride themselves on knowing things.
Also Verin knew that Egwene was going to have her accepted test very soon, perhaps immediately since Elayne went through while Verin and Egwene were talking.