Foreshadowing: Chloe is gonna endup killing Lana.

[Lana's Devious]

It seemed like they we setting up a big fight. I think Lana will eventually end up going mad and crossing the line, resulting in Chloe having to stop and kill Lana in order to protect Clark in some way.

[kp1984]

That will never happend. I don't see Chole doing this. The only person i see chole killing is Lex.

[CDLBLUE]

If Chloe did kill Lana it would be not be by any yardstick imageable a tragedy, it would more of a case of euthanasia, Lana has been dead or years.