Attuned: TFT Set 18 trait
Attuned is a single-unit trait in TFT Set 18: it belongs to Alune and is active as soon as Alune is on the board.
What Attuned does
Your strongest Alune cycles to a new phase of the moon after each cast. While the moon is at or below half full, your team gains 7% Durabilty. While above, your team gains 7% Damage Amp.
From Riot's game data, with the latest patch notes applied; the exact numbers can change between patches.
Alune