They can start Clan Wars and manage members, including promoting, demoting, or kicking them from the group. They can also tweak all of the Clan Settings (like the minimum Trophy requirement to join, the frequency of Clan Wars, or the Clan badge). Whoever founded the Clan automatically becomes the Leader, but leadership can later be transferred to the Co-Leader if the Leader is inactive for more than 60 days. It’s important to find a Clan where the Leader is both knowledgeable and actively involved, as they are in charge of making crucial decisions for everyone involved.