Solstice Dragon

Description
This dragon can only be found on the longest night of the year, when the Winter Solstice takes place, so if you find one, persuade it to come with you! You’ll only get one opportunity a year!

Trivia

 * It was released on 21 December 2015
 * It has the same appearance and animation as the Equinox Dragon
 * The winter solstice is at midwinter, at the time of the shortest day, about 22 December in the northern hemisphere and 21 June in the southern hemisphere.