The Key to the Kennels resets all of the player's generation one pets and/or mounts to zero. In other words, every pet and mount the player owns, with the exception of pets/mounts they gained through questing and rare/magic potion pets/mounts, is released/removed from their stable. Once it has been used, the player will be able to stack the Beast Master, Mount Master, and Triad Bingo achievements. There are three available options that the Key can perform. The player can release their pets, their mounts, or both simultaneously.