Here is the answer from the release notes.
Events:
Anniversary Cards and future card recipes are now linked to their events, which means that the recipes created by combining various cards will only be available when the event is active. Anniversary Cards can no longer be used to make Anniversary Card recipes.
Festivult Cookies have seen some adjustments for 2014! The Lord of Blades Cookie now has Blade Barrier, the Marilith Cookie has Burning Blood, Suulomades Cookies now has Teleport (and can be used in public spaces), the Warforged Titan Cookie now has Titan's Grip, and the Web Cookie now has Rejuvenation Cocoon
CARDS ARE NOT USELESS. Please continue with you normal routine.
Ooooo, Suulomades cookies!!! I wonder how many of those I have.