Mordekaiser: change history

9 changes across 4 patches (Jul 14, 2026 to Oct 6, 2026), newest first. Nerf Radar tracks the 10 most recent official updates for League of Legends, back to May 27, 2026.

Buff 6Nerf 1Adjust 1Fix 1

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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)

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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

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

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Stat Steal: 8% → 10%
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

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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%

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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).

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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%

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Damage Taken: -2% → 0%
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%

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Stat Steal: 10% → 13%

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.