The Grand Tournament Cards

Credit to this Reddit post for the nice table of cards in text format.

Credit to Hearthstoneplayers make a visual version of it, hope you enjoy it!

Personally, Frost Giant will be OP in Handlock and Control Warrior's deck. They will power up anyway.
Also Fjola Lightbane and Eydis Darkbane if she continues to survive esp. in Priest deck, OP man.

Neutral Legendaries

Neutral Epics

Neutral Rares

Neutral Commons

Druid

Hunter

Mage

Paladin

Priest

Rogue

Shaman

Warlock

Warrior

Upgraded Hero Powers

Justicar Trueheart can upgrade your Hero Powers!