09e4cafc_tions___Crusader_Kings_II_Wiki__Requirement
[Ambition] Lower Decadence [Success Condition] Has a lower decadence than 60.0% [Success Effect] Gain 100.00 Prestige [Requirement] 
Over 16 years old Ruler Muslim Decadence higher than 60.0% Not incapable
Ambitions - Crusader Kings II Wiki
Requirement