Overtuned Traits
Concept · Stellaris 4.5.2
Overtuned Traits in the Stellaris encyclopedia: Overtuned traits provide greater benefits compared to regular species traits at the cost of reducing leader lifespan.
Overtuned Traits in the game's words
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Overtuned traits provide greater benefits compared to regular species traits at the cost of reducing leader lifespan.
Source: common/game_concepts (concept_overtuned_traits) and localisation/english, Stellaris Cygnus v4.5.2 (9776).