The game currently allows you to log on as three characters at a time
without any penalties.  You are still asked to please not use character purely
for storage or muling and to not share characters.  It is understood that it is 
convenient to be able to log on as a high level mage or necro when no one is
online, however that makes the already super loose nature and convenience of 
multiplay reach more ludicrous levels.

See Also: Mud rules, Triggers

such as "spell" or "MUD Basics"