Train
Syntax:
train <player name>
This is the method of improving your tech level.
To advance to become a more potent assassin/mentat, each member of the Bene Tleilaxu must seek training from an Elder.
NOTE: An Elder holds a tech level that is equal or higher then your own.
NOTE: Iilevarn, located in the tunnels north of the main Guild Hall, is also able to train if you ask him to 'teach' you.