Sona's basic abilities use the stance mechanic. In addition to their activation effects, her basic abilities each grant a unique and persistent aura until she activates a different basic ability to change stance. The previous aura persists for 1 more second after Sona enters a different stance. Changing stances sets off a 0.5 second cooldown on Sona's basic abilities.
After 3 ability casts, Sona's next basic attack will deal
13 / 20 / 27 / 35 / 43 / 52 / 62 / 72 / 82 / 92 / 102 / 112 / 122 / 132 / 147 / 162 / 177 / 192 (6 + 7 / 8 / 9 / 10 / 15 at each level) (+ 20% AP) bonus magic damage, with an additional effect depending on the last basic ability cast.
Power Chord is a one-use on-hit effect that triggers periodically.
The triggering attack will apply other on-hit effects and can critically strike as normal.
Power Chord's bonus damage will go through dodge and parry, while the triggering attack will be mitigated.
The entire damage will be mitigated with the attack is blocked.
When Power Chord is ready, Sona gains a ring around her. This ring will have a different color depending on the last ability used (blue, green or purple). The effect does not change if abilities are used while the projectile is in motion.
If Power Chord reaches its third charge using Crescendo, its effect will be that of the active aura at that time, or that of whichever ability Sona uses thereafter.
If no song is playing when Power Chord is ready, it will have no effect and the buff is consumed after the next autoattack.
Sona's auras will only affect allied champions, not minions or pets.