Anatomy of cards, and possibility of trading between or within players?
I'm a relatively new player (losh14) and wanted to know if there was a guide to the anatomy of the cards. I've figured out most of it, but I can't tell a difference between uncommon, common, rare and epic by looking at a card.
Also, in my booster packs I've received some cards that don't work with my hero, ie an Elf card for my Undead hero. Is it possible to trade these (or any, really) cards with other players? Can I trade them between my two heroes, ie if I were to also start a new game with a new Elf hero?