Board Thread:Spoilers!/@comment-26196542-20150930211355/@comment-25375217-20151005175023

The Darkness said that re-merging Excalibur will snuff out the light. That seems to imply that whoever holds the full Excalibur will be given some form of immense power, right? Now, there's the chance that Arthur doesn't know this, and that he just wants it whole because it looks prettier that way or something stupid, but it seems to make more sense that he knows he can become all-powerful if he wields the full Excalibur.

Or, maybe he doesn't, and maybe Guinevere does and she's just using him. But Arthur's casting call seems to imply that he knows.