The new guilds are awsome. They work by donating shards to your guild and adventualy the leader can buy stuff that you can activate that will alow you to have a more powerful defence and more loot per attack. As you donate shards to the clan the clan earns credits to buy stuff. Guilds are measured by might and credits. To create you own guild it takes 500,000 gold so a lv 12 town hall recommended. If you can get into an active guild like mine (force_team) your set. Have fun talking to felow guild members and getting stuff!