Mystery Crates

The Mystery Crates were introduced on August 28, 2012 together with an associated challenge.

Mystery crates are available for a cost of 49. You need to be on Version 1.14 or higher to acquire a mystery crate.

Challenge: Spread the Word
There have been two reports by users that the crystals can be obtained without actually purchasing any of the mystery boxes. The steps to do so are as follows: It does not seem to work for everyone, so if it doesn't, there is no need to comment.
 * 1) Open the challenge and look at it.
 * 2) (Unconfirmed step) Select and cancel the purchase of the mystery crate three times.
 * 3) Tip 5 people and return to your village. You should earn 11 crystals.
 * 4) Open the challenge and look at it.
 * 5) (Unconfirmed step) Select and cancel the purchase of the mystery crate twice.
 * 6) Tip 5 more people and return to your village. You should earn 10 more crystals.