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Upgrade Thornmail

Upgrade Thornmail

Silver
Upgrades Bramble Vest and Thornmail, increasing the armor stat of both items by 25 and empowering Thorns to generate a protective shell around you that grants 25% damage reduction. The shell is broken by the next enemy champion to use a basic attack on-hit against you, which causes them to take 50 to 250 (+ 30% armor) (+ 30% magic resistance) (+ 12% maximum health) magic damage. Shell regenerates after 20 to 5 seconds of being out-of-combat.

Retired in live Mayhem

This augment was removed from live ARAM Mayhem in Patch 26.13. The page stays available for patch history, old clips, and combo references.

Meta Patch
26.13
Upgrade Thornmail Trend (Recent Snapshots)
Win Rate Change
+0.02%
Pick Rate Change
+0.27%
Rank Change
+1
Date Patch Rank Win Rate Pick Rate
2026-06-09 26.11 #115 55.35% 12.22%
2026-06-08 26.11 #116 55.33% 11.95%
2026-06-05 26.11 #116 55.44% 12.03%
2026-06-03 26.11 #117 55.28% 11.93%
2026-06-02 26.11 #117 55.37% 11.85%
2026-06-01 26.11 #117 55.37% 11.85%

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Champion Combos with Upgrade Thornmail View all combos →
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Upgrade Thornmail Augment Guide - ARAM: Mayhem

Upgrade Thornmail was removed from live ARAM Mayhem in Patch 26.13. This page keeps the historical tooltip, rarity, and references available after the augment left the live pool.

Upgrades Bramble Vest and Thornmail, increasing the armor stat of both items by 25 and empowering Thorns to generate a protective shell around you that grants 25% damage reduction. The shell is broken by the next enemy champion to use a basic attack on-hit against you, which causes them to take 50 to 250 (+ 30% armor) (+ 30% magic resistance) (+ 12% [b]maximum[/b] health) magic damage. Shell regenerates after 20 to 5 seconds of being out-of-combat.

When selecting augments in ARAM: Mayhem, Upgrade Thornmail is particularly effective on champions that can maximize its benefits.