What changed for Mordekaiser?

9 changes across 4 patches (Jul 14, 2026 to Oct 6, 2026), newest first.

1. Oct 6, 2026League of Legends Patch 26.20Buff 2Official notes ↗
   Buff

   Summoner's Rift Q - Obliterate · Damage scaling from level 10 to 20

   Damage scaling on Mordekaiser's Obliterate (Q) from level 10 to 20 increases from +5 per level to +7 per level.

   (+5 per level)→(+7 per level)

   Source line

   Scaling Level 10-20: (+5/lvl) → (+7/lvl)

   Buff

   Summoner's Rift R - Realm of Death · Cooldown

   Cooldown on Mordekaiser's Realm of Death (R) decreases from 140 / 120 / 100s to 120 / 110 / 100s.

   140 / 120 / 100s→120 / 110 / 100s

   Source line

   Cooldown: 140 / 120 / 100s → 120 / 110 / 100s

2. Aug 11, 2026League of Legends Patch 26.16Buff 1Official notes ↗
   Buff

   Arena R - Realm of Death · Stat Steal

   Stat steal on Mordekaiser's Realm of Death (R) increases from 8% to 10%.

   8%→10%

   Source line

   Stat Steal: 8% → 10%

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

   Summoner's Rift E - Death's Grasp · Cooldown

   Cooldown on Mordekaiser's Death's Grasp (E) decreases from 18 / 16 / 14 / 12 / 10 to 16 / 14 / 12 / 10 / 8.

   18 / 16 / 14 / 12 / 10→16 / 14 / 12 / 10 / 8

   Source line

   Cooldown: 18 / 16 / 14 / 12 / 10 → 16 / 14 / 12 / 10 / 8

   Nerf

   Summoner's Rift R - Realm of Death · Stolen Stats

   Stolen Stats on Mordekaiser's Realm of Death (R) decrease from 13% to 10%.

   13%→10%

   Source line

   Stolen Stats: 13% → 10%

   Fix

   Summoner's Rift R - Realm of Death · Bugfix

   Fixed a bug with Mordekaiser's Realm of Death (R) where ulting a target with health above their post-reduction max HP would lead to increased damage (up to double).

   Source line

   Bugfix: Fixed a bug where ulting a target with health above their post-reduction max HP would lead to increased damage (up to double).

   Adjust

   ARAM: Mayhem Damage Taken

   Mordekaiser's damage taken modifier changes from -2% to 0%.

   -2%→0%

   Source line

   Damage Taken: -2% → 0%

4. Jul 14, 2026League of Legends Patch 26.14Buff 2Official notes ↗
   Buff

   Summoner's Rift E - Death's Grasp · Damage

   Damage on Mordekaiser's Death's Grasp (E) increases from 60 / 75 / 90 / 105 / 120 (+40% ability power) to 60 / 80 / 100 / 120 / 140 (+45% ability power).

   60 / 75 / 90 / 105 / 120 (+40% ability power)→60 / 80 / 100 / 120 / 140 (+45% ability power)

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   Damage: 60 / 75 / 90 / 105 / 120 (+40% Ability Power) → 60 / 80 / 100 / 120 / 140 (+45% Ability Power)

   Buff

   Summoner's Rift R - Realm of Death · Stat Steal

   Stat steal on Mordekaiser's Realm of Death (R) increases from 10% to 13%.

   10%→13%

   Source line

   Stat Steal: 10% → 13%