Hearthpwn

Shaman becomes "(1): Summon a (basic) Totem of your choice" - it also let you summon more than once the same basic totem

The abilities that come from Justicar Trueheart: http://www.hearthpwn.com/cards/22276-justicar-trueheart

Thanks! I was going to make a post that compiled them all in a list to help us all out, but looks like I don't have to.

Hunter becomes "(1): Deal 3 damage to the enemy hero"

When your heropower is upgraded (dk etc) it still costs 1, the other effect like extra dmg may be lost

Rogue becomes "(1): Equip a 2/2 weapon"

Druid is "(1): +2 attack, +2 armor"

Warlock becomes "(1): Draw a card."