Stats

Armor, magic resist, mana and attack speed are the same at every star level.

Alune

1 star: Rain meteors through the row with the most total enemy Health. Meteors deal ? magic damage split between all enemies hit. Deal ? magic damage to the current target. All enemies hit are 20% Shredded for 6 seconds. Grant 20% Attack Speed split amongst allies in Alune's row for 5 seconds. Shred: Reduce Magic Resist
2 star: Rain meteors through the row with the most total enemy Health. Meteors deal ? magic damage split between all enemies hit. Deal ? magic damage to the current target. All enemies hit are 20% Shredded for 6 seconds. Grant 25% Attack Speed split amongst allies in Alune's row for 5 seconds. Shred: Reduce Magic Resist
3 star: Rain meteors through the row with the most total enemy Health. Meteors deal ? magic damage split between all enemies hit. Deal ? magic damage to the current target. All enemies hit are 20% Shredded for 6 seconds. Grant 30% Attack Speed split amongst allies in Alune's row for 5 seconds. Shred: Reduce Magic Resist

3 patches changed Alune, read out of Riot’s game files.