Shrink Engine: change history

1. May 27, 2026League of Legends Patch 26.11Buff 2Nerf 1Official notes ↗
   Buff

   Arena Stacks lost on death

   Stacks lost on death on Shrink Engine decrease from 50% / 0% to 25% / 0%.

   50% / 0%→25% / 0%

   Source line

   Stacks lost on death: 50% / 0% → 25% / 0%

   Buff

   Arena Haste per stack

   Haste per stack on Shrink Engine increases from 8 to 8 / 10.

   8→8 / 10

   Source line

   Haste per stack: 8 → 8 / 10

   Nerf

   Arena Movement Speed per stack

   Movement speed per stack on Shrink Engine decreases from 10% to 1% / 1.5%.

   10%→1% / 1.5%

   Source line

   Movement Speed per stack: 10% → 1% / 1.5%

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.