Immortal characters should, if they have the "zealous" trait, the "content" trait, or have lived for 100 years, get an option to retire to a monastery. This option would allow said character to abdicate to their heir and gain the "monk" or "nun" trait while remaining in court. This way we can play as a new character without our immortal having to die.
In the current game, the only way to get this effect is to concede to defeat in a "war against your tyranny" was and then cloister the immortal as their heir, or get excommunicated and hope that the Pope chooses the "retire to monastery" decision.
In the current game, the only way to get this effect is to concede to defeat in a "war against your tyranny" was and then cloister the immortal as their heir, or get excommunicated and hope that the Pope chooses the "retire to monastery" decision.