3 months since the last sale on the Endless Legend Expansion Set (16th of Feb), unfortunately I missed that sale and I've been dying to play the DLC since. However spending more than I spent on the actual game for DLC (£34 versus £10 on sale) is crazy, especially when my friend who got the game just recently managed to get all the DLC and the game for much cheaper. 

It's on sale right now for 75% off on steam.