Elv dimming is a natural part of the elv life cycle. As elves age, their bodies produce less and less of the magical essence that gives them their unique abilities. Over time, they will begin to lose their spark and their magical abilities will start to fade. Eventually, they will become too weak to perform their duties and will need to retire from the workshop. It is a natural process that all elves go through and is nothing to be ashamed of or afraid of. It just means that it's time for a new generation of elves to take over the workshop and continue the legacy of Christmas magic.