Hearthstone Invalid Cards

Open the Doorways Enchantment Ophidian Ophidian Staff Opponent's Class: Druid Ench Opponent's Class: Hunter Ench Opponent's Class: Mage Ench Opponent's Class: Paladin Ench Opponent's Class: Priest Ench Opponent's Class: Rogue Ench Opponent's Class: Shaman Ench Opponent's Class: Warlock Ench Opponent's Class: Warrior Ench Opportunist Optimism Optimism Optimized Polarity Enchantment Orange Egg Orange Hatchling Orbiting Halo Orb of Revelation Orb of Revelation Enchantment Orb of the Unknown