back when the game first came out there were so many priests that you had to literally design every deck around shadow words. almost all of my minions were 4 attack. not to mention mind control was 8 mana instead of 10, so you had to make sure your minions were strong, but not gaming changing minions to where turn 8 he gains a huge advantage. spending 8 mana just to steal a chillwind yeti is horrible value. i was wrecking priests all day at that point, up until they dropped out of the meta and the game turned into Hunterstone, the most mindless class in the game that will get you to legendary in an afternoon.