The following are the Rules the Four Dragons gave to the Magic Speakers of Ryunin.
Rule 1: Respect your Familiar and its mana. Don’t forget they
have feelings, too.
Rule 2: Never undo your own magic. Make sure to set clear parameters if you don’t want
something to be permanent.
Rule 3: If something does need to be undone, only another
Familiar’s Mana Following can do it.
Rule 4: You can’t bring the dead back to life.
Rule 5: Do not affect another person, mentally or physically,
without their permission.
Rule 6: Do not use magic for selfish or illegal reasons.
Rule 7: Mana can manipulate and transform things, including
a Magic, but they themselves cannot transform.