Effective date: September 23, 2026 on Riot's official patch schedule (Pacific Time; check the client for your region's exact rollout).
[Key figures by weapon]
Calibrum Moonshot damage: 70–160 → 80–170. The base damage rises by 10 at each level; the listed ratios stay the same.
Severum healing: 2–7.1% → 2–8%, with the enhanced range going from 5–17.75% to 5–20%.
Gravitum slow: it still starts at 30% over 2.5 seconds, but the decaying floor rises from 10% to 15%.
Infernum Duskwave cooldown: 9/8.25/7.5/6.75/6s → 8/7.25/6.5/5.75/5s, one second faster at every rank.
Crescendum mini-chakram damage: 15% AD → 16% AD. The minimum 5% AD now begins at the ninth or later chakram rather than the eighth or later.
[What to watch in a match]
Check Calibrum for poke and Severum for sustain. Gravitum changes the tail of the slow, not its initial strength. With Infernum, ask whether the shorter cooldown allows a second cast at a useful moment. Crescendum matters most when you build up chakrams. None of this alone proves that every weapon combination will gain the same win-rate benefit.
[Practice-tool check]
Compare tooltip figures with the same level and items. Actual damage still varies with armor and bonus attack damage. In particular, do not read Severum healing or stacked chakrams as a single flat damage number. The image is Riot Games' official Aphelios artwork; the figures come from its official 26.19 notes.
Sources: Riot Games patch notes https://www.leagueoflegends.com/en-us/news/game-updates/league-of-legends-patch-26-19-notes/
Patch schedule https://support.riotgames.com/en-us/league-of-legends/gameplay/patch-schedule-league-of-legends
Official image https://www.leagueoflegends.com/en-us/champions/aphelios/