At max

stacks, Sona's next auto attack consumes the stacks and has a bonus effect.

deals bonus damage,

lowers the enemy's damage output, and

slows the target.

Gaining max

stacks resets Sona's auto attack.

Anytime

or

affects champions, Sona gains Accelerando stacks, granting her non-ultimate ability haste per stack. At max stacks,

's current cooldown is reduced each time she would normally gain a stack.

's duration extends to 7 seconds (from 3 seconds) if Sona doesn't take damage.

Has incredible scaling with Accelerando stacks.

Excels at sieges and teamfights with

's auras.

Synergizes well with

,

,

,

, and

. Can opt for

,

, or

when needed.

Immobile, leaving her vulnerable to ganks.

Uses abilities in rapid succession, burning through her mana quickly.

Her team can struggle when the incorrect

empowered auto is used in fights.