Terrismen or Terriswomen with Feruchemical abilities are called Keepers. Each Keeper has a specific field of knowledge on which they focus, but all Keepers carry all of the previous Keeper’s knowledge. Since knowledge stored by one Keeper cannot be accessed by another, an elder Keeper must recite their entire library of knowledge for the new Keeper to store in their coppermind. In many cases, this recitation may take many months or even years. Every new generation of Keeper is charged with the mission to collect and store as much information as possible in their lifetime, to return to Terris when the time has been decided and pass all their knowledge on to the next Keeper, to always hide their Feruchemy from everyone lest their copperminds be destroyed and their knowledge lost forever, and above all, when the time comes and the Lord Ruler falls, to be ready to travel the land and teach their knowledge freely and openly to all that want it or need it. There is a council of elder Keepers that make decisions concerning the use of copperminds and of where Keepers go to collect information; they are known as the Keeper Synod.