I don't know if it is on purpose but I finally pulled an extra stone tower so i had all the evolutions it would not let me fuse my lvl 5 wood into it until i found 1 extra wood tower. Although there were other cards that I only had one of that poped up in the fuse window sorry if this does not make sense...
I haven't played all the classes yet but the archer is pretty OP lol also idk if it is a bug or i miss read something but on the fighter once I unlocked all the perks it gave me beserk back...also pretty great game I really enjoyed it
THey were removed