After being almost exclusively absent for 3 years this Xmas event Frozen Manors are making a huge splash come back. Well, that was just rumors. The Xmas Surprise Package costs 350 gems and offers a deco box with Xmas decoration, 3 decos and 11 buildings. Silos, farms and water mills (both improved and regular version), Improved Store House and population buildings including White Castle, Gingerbread House and Frozen Manor.
With stand alone population of 140 and the 2x2 size of a regular building, FM is the best population building in the game. Period. This is so far the top of the mountain when it comes to population efficiency. Unfortnatly with the 1.6% chance of dropping you might be better off NOT spending gems on the boxes.
Here is the info on drop chance from test server. Use your own judgement if you think the chances of getting what you want are good enough to spend gems.
http://forum.tsotesting.com/threads/...ight=christmas
And Wiki page about the evnt:
http://settlersonlinewiki.eu/en/even...as-event-2016/ Wiki event page