Zilean: change history

1. Sep 22, 2026League of Legends Patch 26.19Adjust 3Official notes ↗
   Adjust

   League Classic Passive - Heightened Learning · Bonus Experience While Dead

   Zilean's Heightened Learning (Passive) no longer grants bonus XP while Zilean is dead.

   No longer grants bonus XP while Zilean is dead

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   Bonus Experience While Dead: No longer grants bonus XP while Zilean is dead.

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   League Classic Q - Time Bomb · Cast Visibility

   Casting Zilean's Time Bomb (Q) from fog of war now reveals him.

   Casting the spell now reveals Zilean if cast from fog of war

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   Cast Visibility: Casting the spell now reveals Zilean if cast from fog of war.

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   League Classic E - Time Warp · Cast Range

   Cast range on Zilean's Time Warp (E) changes from 550 edge to edge (around 650 in practical use) to 700 center to center.

   550 edge to edge (around 650 in practical use)→700 center to center

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   Cast Range: 550 edge to edge (around 650 in practical use) → 700 center to center

2. Aug 25, 2026League of Legends Patch 26.17Nerf 1Official notes ↗
   Nerf

   Arena R - Chronoshift · Cooldown

   Cooldown on Zilean's Chronoshift (R) increases from 120s / 90s / 60s to 150s / 120s / 90s.

   120s / 90s / 60s→150s / 120s / 90s

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   Cooldown: 120s / 90s / 60s → 150s / 120s / 90s

3. Jul 28, 2026League of Legends Patch 26.15Nerf 1Adjust 1Official notes ↗
   Nerf

   ARAM: Mayhem Damage Dealt

   Zilean's damage dealt decreases from 105% to 100%.

   105%→100%

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   Damage Dealt: 105% → 100%

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   ARAM: Mayhem Damage Taken

   Zilean's damage taken modifier changes from 5% to 0%.

   5%→0%

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   Damage Taken: 5% → 0%

4. Jun 23, 2026League of Legends Patch 26.13Nerf 2Adjust 1Official notes ↗
   Adjust

   Arena

   Zilean's Arena-specific Q overrides are removed.

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   Removed Arena-specific Q overrides.

   Nerf

   Arena Q Base Damage

   Zilean's Q base damage decreases from 100–360 to 75–300.

   100–360→75–300

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   Q Base Damage: 100 - 360 → 75 - 300

   Nerf

   Arena Q Ability Power Ratio

   Zilean's Q ability power ratio decreases from 100% to 90%.

   100%→90%

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   Q Ability Power Ratio: 100% → 90%

Each step links to the full patch breakdown and to Riot Games's official notes. Changes listed under a general heading such as "Bug fixes" are not included here; search to find every mention.