For those who don't play Hearthstone, Shaman hero power make him summon a totem. Different from all other heroes which have a fixed effect (heal, summon a soldier, etc), you don't know which of 4 totems you are going to get which makes his power very unpredicable and many times not worth spending mana.

Charged Hammer, while not a very impressive weapon may still be used for some desperate Shaman trying to avoid the default Shaman power.

I don't expect the weapon to be effective, it cost too much but again, it's this or totems. Isn't easy to be Shaman.