09e4cafc_tions___Crusader_Kings_II_Wiki__Requirement
[Ambition] Gain a Landed Title [Success Condition] Is Ruler [Success Effect] Gain 50.00 Prestige Opinion towards liege changed by +20 [Requirement] 
Over 16 years old Not a prisoner Not female Not a ruler Not incapable Liege is a close relative and has extra landed titles
Ambitions - Crusader Kings II Wiki
Requirement