Halloween Special

[tevoid]

Dark Elixir awards for spooky single player levels. For the holidays create new single player levels with different awards. Halloween levels would award dark elixir. Christmas could be the regular gold and elixir or even gems.
st Patrick's day would be gems or gold for sure. Thanksgiving would be elixir. Maybe 3 levels per holiday.

[Sten]

The new single-player levels idea sounds cool

[FireThief]

Dark Elixir awards for spooky single player levels. For the holidays create new single player levels with different awards. Halloween levels would award dark elixir. Christmas could be the regular gold and elixir or even gems.
st Patrick's day would be gems or gold for sure. Thanksgiving would be elixir. Maybe 3 levels per holiday.

Personally, I think there should be a whole set of bonus levels in single player that are only available for a short amount of time- the theme depending on the holiday. For example Christmas, Halloween etc.