Cataclysm may also eventually include a system that allows players to scale down their character's level in order to help newer players. The heirloom items unveiled in Wrath of the Lich King already scale with a character's level, so adjusting them to suit a downgraded character is already part of the design. Cataclysm will go one step further and replace individually purchased spell ranks with a scaleable system that allows a single ability to grow along with a character. Scaling down levels probably won't be possible when Cataclysm is released, but it's a feature that will be coming eventually and should help players of differing levels adventure together more easily.