This holiday pack introduced in Version 1.28 added the Holidays card, along with many combos. When purchased, the player receives 3 random Yuletide Cards from the card pool below. The Holidays card is not guaranteed, even though it is the most valuable. In addition, if you received the daily gifts from the 12 Days of Alchemy, then you would obtain the Snowflake card from this pack.
The Yuletide Pack was unlocked December 18, 2014 to December 27th, 2014.