When the Shaman class got Spirit Claws as part of the One Night in Karazhan adventure it just added to their embarrassment of riches.
9 potential damage for 1-mana meant this card was an auto-include in all Shaman decks, and rolling a spell power totem has become an important part of play the class.
Well, Spirit Claws is finally going to get hit with the nerf hammer in patch 7.1 due for release around the end of Feb. It’s not a massive nerf, and my guess is that the card is still going to be played, however:
Spirit Claws mana cost is changing from 1 > 2.