Three: Keeper of Uldaman
Keeper of Uldaman is another card that made people question Blizzard’s rarity decisions. When League of Explorers was released, they showed up twice as often in arena, like other sets. That meant Keeper was showing up a ton, since there weren’t a lot of League of Explorers cards. At that point it was not uncommon for Paladin decks to run four Keepers in arena. Which you would do, because Keeper is an insane card.
Keeper of Uldaman is Aldor Peacekeeper’s older brother. The mana cost is a bit more, the body is a bit bigger. But the effect is just as powerful. Aldor Peacekeeper can make cards do no damage, but Keeper makes them easy to remove. Suddenly cards with abilities are no longer difficult to kill. However, the ability is far stronger than mere removal. The fact that Keeper’s effect can be used on either player’s cards is game changing. Working alongside the Paladin hero power, Keeper can suddenly turn 1/1s into 3/3s. Removal and buffing in a single package. The versatility alone makes Keeper one of the strongest cards in the game, forget arena. And it’s a common!
