League of Legends Patch 13.8 notes Aurelion Sol saw another nerf in League of Legends Patch 13.8, as well as the report system being extended beyond post-match screens. Source: Riot Games.

Yes, it actually is sol: it’s traditionally written that way when the tonic notes are spelled out, and often referred to colloquially as the Solfa or Solfège scale. That final L is hard to hear ...