CK3 DatabaseCrusader Kings III · 1.20.0.3 “Crozier” · unofficial

Law · Succession Laws

Ultimogeniture

Ultimogeniture is a succession law in Crusader Kings III: Under Ultimogeniture Succession, your youngest child inherits all your Titles. Modifiers: Glory Hound Vassal Opinion -10, Parochial Vassal Opinion -5, Player Heir Opinion +20, Eligible Child Opinion -5. Passing it costs 500 prestige before modifiers. Patch 1.20.0.3, from game/common/laws/00_succession_laws.txt.

Under Ultimogeniture Succession, your youngest child inherits all your Titles.

Upon succession, all of the late Ruler's Titles will be given to the Player Heir, which is their youngest Eligible Child. Older children will receive nothing.

Modifiers

How succession works

Order of succession
inheritance
Traversal
children
Rank
youngest
Title division
single heir

The values are the game's own keys from the law's succession block.

The succession laws

  1. 1Confederate Partition
  2. 2Partition
  3. 3High Partition
  4. 4Primogeniture
  5. 5Kurultai
  6. 6Ultimogeniture
  7. 7House Seniority
  8. 8Acclamation Succession
  9. 9Appointment Succession
  10. 10Camp Succession
  11. 11Theocratic Elective
  12. 12Clerical Appointment
  13. 13Theocratic
  14. 14Military Order
  15. 15Cultural Military Order
  16. 16Monastic Order
  17. 17Female Monastic Order
  18. 18Male Monastic Order
  19. 19Mercenary Company
  20. 20Republican
  21. 21Antagonistic Succession
  22. 22Competitive Succession
  23. 23Impassive Succession
  24. 24Friendly Succession
  25. 25Harmonious Succession
  26. 26Herder Succession
  27. 27Celestial Appointment Succession
  28. 28Celestial Commander Succession
  29. 29Japanese Regency Succession
  30. 30Ritsuryō Appointment Succession
  31. 31Ritsuryō Military Succession
  32. 32Mandala Succession
  33. 33Meritocratic Appointment Succession
  34. 34Meritocratic Commander Succession
  35. 35Meritocratic Regency Succession

Who can pass it

Can pass (can_pass) (17 lines of game script)
can_change_succession_law_trigger = yes
trigger_if = {
	limit = {
		government_has_flag = government_is_clan
	}
	piety_level >= 3
}
trigger_if = {
	limit = {
		government_has_mechanic = administrative
	}
	influence_level >= 4
	has_active_diarchy = no
	primary_title = {
		title_held_years >= 10
	}
}

As written in game/common/laws/00_succession_laws.txt.

Can have (can_have) (4 lines of game script)
NOT = {
	government_has_flag = government_is_nomadic
}
can_have_single_heir_youngest_succession_law_trigger = yes

As written in game/common/laws/00_succession_laws.txt.

Kept while (can_keep) (8 lines of game script)
can_keep_single_heir_youngest_succession_law_trigger = yes
custom_description = {
	text = succession_laws_must_not_be_forced_partition
	NAND = {
		top_liege != this
		vassal_contract_has_flag = locked_to_partition
	}
}

As written in game/common/laws/00_succession_laws.txt.

Source: game/common/laws/00_succession_laws.txt, common/law_groups and the English localisation, Crusader Kings III 1.20.0.3. A cost shows the base the files give; “varies” when it depends on your realm.