They're falling under the Puppetmancer's spell. He's offered only the thing they want the most. All they have to do is let everything out that Vetra captured. As I said that may include things won in battle BEFORE she became corrupted. Smashing the thing might be opening Pandora's Box. Hell even TALKING about it already has Roko running off to do something ill thought out and stupid to stop it happening. He thinks they just want to get rid of him!
Vetra needs to go, not that gem. What's in there needs to be released in a controlled fashion.
