Right now there is a create your own anniversary greeting card event via the in game event button in Castle Clash.
You just need to make a quick card via the 3 different buttons and post it to facebook! There is then a link created to vote for your specific card!
Top 200 voted cards get 5 anniversary bags and the top 5 get the 5th anniversary game skin!
If you'd be so kind to vote for mine I'd be ever so thankful
I'll gladly vote for yours too ;D
I'm number #3846047 on page 23!
Mine looks like this! Link below!
Here's a link!