Non Disclosure Agreement

A Non Disclosure Agreement is a pretty much mandatory part of any Closed Beta.

TL:DR
First rule of the closed beta: You don't talk about closed beta in public or the lawyers will eat your soul and wallet.

A little more seriously
Every tester in the Closed Beta had to agree to legally binding contract that requires them to maintain confidentiality in regards to information related to the closed beta. They can't talk about it in public or post screenshots of it anywhere. The only exception is when the given piece of information or the specific illustration was already made public by the developers.

Breaking the NDA can and will have very serious legal consequences - it's very serious business and the MWT Wiki does not want to be involved in any such incident.

If you post any materials violating the NDA here, they will be removed and your access to the Wiki may be suspended to prevent further leaks until the NDA is no longer in force.