[IC][D&D5e] Themebased group, rotating GM

New Ability Scores: Honor and Sanity
DMG p264

If you're running a campaign shaped by a strict code of honor or the constant risk of insanity, consider adding one or both these new ability scores: Honor and Sanity.

These abilities function like the standard six abilities, with exceptions specified in each ability below.

Here's how to incorporate these optional abilities at character creation:

If your players use the standard array of ability scores, add one 11 to the array for each optional ability you add.
If your players use the optional point-buy system, add 3 points to the number of points for each optional ability you add.
If your players roll their ability scores, have them roll for the added ability scores.

If you ever need to make a check or saving throw for Honor or Sanity for a monster that lacks the score, you can use Charisma for Honor and Wisdom for Sanity.

Honor Score
If your campaign involves cultures where a rigid code of honor is part of daily life, consider using the Honor score as a means of measuring a character's devotion to that code. This ability fits well in a setting inspired by Asian cultures, such as Kara-Tur in the Forgotten Realms. The Honor ability is also useful in any campaign that revolves around orders of knights.

Honor measures not only a character's devotion to a code but also the character's understanding of it. The Honor score can also reflect how others perceive a character's honor. A character with a high Honor usually has a reputation that others know about, especially those who have high Honor scores themselves.

Unlike other abilities, Honor can't be raised with normal ability score increases. Instead, you can award increases to Honor—or impose reductions—based on a character's actions. At the end of an adventure, if you think a character's actions in the adventure reflected well or poorly on his or her understanding of the code, you can increase or decrease the character's Honor by 1. As with other ability scores, a character's Honor can't exceed 20 or fall below 1.

Honor Checks.
Honor checks can be used in social situations, much as Charisma would, when a character's understanding of a code of conduct is the most defining factor in the way a social interaction will play out. You might also call for an Honor check when a character is in one of the following situations:

Being unsure how to act with honor
Surrendering while trying to save face
Trying to determine another character's Honor score
Trying to use the proper etiquette in a delicate social situation
Using his or her honorable or dishonorable reputation to influence someone else

Honor Saving Throws.
An Honor saving throw comes into play when you want to determine whether a character might inadvertently do something dishonorable. You might call for an Honor saving throw in the following situations:

Avoiding an accidental breach of honor or etiquette
Resisting the urge to respond to goading or insults from an enemy
Recognizing when an enemy attempts to trick a character into a breach of honor