Sona build for Support, Emerald+

Accelerando: Sona gains non-Ultimate ability haste permanently for her basic abilities as she uses her abilities well, up to a cap. Beyond that cap, further successful uses reduce her ultimate's remaining cooldown instead. Power Chord: Every few spell casts, Sona's next attack will deal bonus magic damage in addition to an additional effect based on what basic Ability Sona last activated.

Sona plays the Hymn of Valor, sends out bolts of sound, dealing magic damage to two nearby enemies, prioritizing champions and monsters. Sona gains a temporary aura that grants allies tagged by the zone bonus damage on their next attack against enemies.

Sona plays the Aria of Perseverance, sending out protective melodies, healing Sona and a nearby wounded ally. Sona gains a temporary aura that grants allies tagged by the zone a temporary shield.