So, i've been playing this game for a number of years, and i just realized a couple of days ago that set item abilities only work if you use *different* items from the set. Like, if you put 2 Frozen Books, you don't get the Frozen ability. You need a Frozen Book and Frozen Water, etc. Maybe this was obvious to everyone. But all this time i just thought the Withered and Frozen set abilities were basically useless. It was only when i set out to really figure out why i couldn't summon Gib, the Frozen Daemon that i finally figured it out.
Anyway, all this to say: maybe i'm the only one, but it might be helpful to make that more explicit on the cards or somewhere?