Wizards must be reviewed: too strong spells that damage directly creatures and heroes without any protection of armors, too much strong objects that make them draw cards too easly.And then as if this is not enough they have also superstrong ability hat can strike down a creatures deck and also spell that can reset the game just in case. Don't you think has to be changed? Infact if you look to top decks many players have wizard decks....
Also a few word about human allies, also here something should be reviewed: shadow allies have good abilities but human allies have a ramp up too strong: ally that with 1 mana can enter the game and attack, then allies that give shroud to the others, and then the ally that with only 4 mana gives +1 attack, this makes useless the stroghest ability of shadow allies that have summoning sickness and are killed before they can get in battle. Also here completly unfair. Also about avility there are some human allies too strong as that one that with 1 mana makes any opponent ally attack 0 permanently, should be just until next turn.
