[Minoc]

I like the Ultima Online guild system.
You buy a guild stone for money and place it in your house, also guild name can be changed once a week, each member can choose who is he loyal to, the one with most members loyal to him is the guildmaster, also members can add people and they have to wait for the guild master to authorize it.
But for Graal I think global guilds are the best.
I think the sword idea is bad because guilds that add people if they have good stats (hearts,swords,shields) are always newbie guilds.