Colony Ascension
Colony Ascension (colony) in the Stellaris encyclopedia: The Colony Ascension Tier of a Colony increases the effects of the Designation and reduces the effect on Empire Size.
Colony Ascension in the game's words
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The Colony Ascension Tier of a 
Colony increases the effects of the Designation and reduces the effect on 
Empire Size.
Colonies can be ascended multiple times based on the number of unlocked Ascension Perks, and increases in 
Unity cost based on the cumulative number of Ascension Tiers in the Empire.
Unlocking all Ascension Perks increases the Colony Ascension Cap by an additional ….
Entries that mention Colony Ascension
More in Colony
Source: common/game_concepts (concept_planetary_ascension) and localisation/english, Stellaris Cygnus v4.5.2 (9776).