Invocation

Invoking a true name is as simple as knowing a character's true name, and speaking it aloud in the presence of that character. Once the name is spoken aloud, if the invoker has higher Erudition than their target then the target character falls under their thrall. They will feel compelled to do whatever the invoker has commanded them to do, regardless of any moral or practical compunctions on the matter. If asked questions, they will feel compelled to answer as truthfully as possible.

Oaths

When someone swears something by their true name, they are bound to that oath in perpetuity. They can never break the oath, unless the person they swore the oath to releases them from the oath.

Oaths cannot be made to someone who is Soulless.

Conflicting Commands

If someone has been given conflicting commands, then the person whose true name has been invoked is able to ignore both and act freely, irregardless of those two specific commands.

If someone has been made to swear conflicting oaths, then the power of both oaths are broken.

Higher Erudition

If a character is trying to invoke the true name of someone with an equal or higher erudition, they must repeat the name several times. Each time the name is repeated, their target's effective erudition is reduced by one until their Erudition is one lower than the invoker's. This does not apply if the target of the invocation has more than x10 the invoker's Glimmer.

Higher Glimmer

If the target of the invocation has x10 or more Glimmer than the invoker, they are unaffected. Every invocation reduces the effective Glimmer of the target for the purposes of invocation by a factor of ten.