Looking at the cards
Druid: 1 attack: Crypt Lord / Tar Creeper
2 attack: Infested Tauren,Ixlid, Fungal Lord
3 attack: Hadronox
Warlock: 1 attack: Darkshire Councilman/Tar Creeper/Tar Lurker
2 attack: Possessed Lackey
3 attack: Voidlord/Lord Jaraxxus
Paladin: 1 attack: Bolvar, Fireblood
2 attack: Wickerflame Burnbristle
3 attack: Blackguard
neutral: 1 attack: Drakkari Enchanter
2 attack: Dragonhatcher
warrior: 1 attack: Tar Lord
2 attack: Alley Armorsmith
3 attack:Direhorn Hatchling
Shaman: 1 attack: Tar Creeper
2 attack: Voodoo Hexxer
3 attack: Al'Akir the Windlord
Hunter: 1 attack: Kindly Grandmother
2 attack: Tundra Rhino
3 attack: Knuckles
21