Treasure map(s) from Sealed 2014 Nice List
Opening this will enter you into one of the following map:
Random Items from Sealed 2014 Nice List
Opening this might give you the following: Details in the MHWiki link below
How to get
A list of the nicest mice this winter that have warmed at least one other heart this season. Tracking down all the mice on the list shouldn't be too tough. Make sure you give each one a special pat on the back!
Mousehunt Wiki page