Description
Reduces the target's Armor for a duration.
Items (11)
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- +250 HP
- +20 MR
30% Sunder enemies within 2 hexes. Gain 15 Armor and Magic Resist for the first 15 seconds of combat. Sunder: Reduce Armor
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- +15% AD
- +20% AS
- +20% Crit
Damage from attacks and Abilities 30% Sunder the target for 3 seconds. This effect does not stack. Sunder: Reduce Armor
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- +500 HP
- +40 MR
30% Sunder enemies within 3 hexes. Gain 50 Armor and Magic Resist for the first 20 seconds of combat. Sunder: Reduce Armor
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- +45% AD
- +40% AS
- +40% Crit
Damage from attacks and Abilities 30% Sunder the target for the rest of combat. This effect does not stack. Sunder: Reduce Armor
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- +15 Armor
- +15 MR
- +20% AD
- +20 AP
Gain 3 orbiting razors. Razors deal ? magic damage, and 30% Shred and Sunder enemies for 4 seconds. Deal 10% increased damage to Shredded or Sundered enemies. Damage increases based on Stage. Recommended Roles: Attack or Magic Fighter
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- +40 Armor
- +40 MR
- +30% AD
- +30 AP
Gain 6 orbiting razors. Razors deal ? true damage, and 30% Shred and Sunder enemies for the rest of combat. Deal 30% increased damage to Shredded or Sundered enemies. Damage increases based on Stage. Recommended Roles: Attack or Magic Fighter
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- +15% AS
- +10% Omnivamp
Attack Champion: Dealing physical damage to an enemy reduces the target's Armor by 2. Magic Champion: Dealing magic damage to an enemy reduces the target's Magic Resist by 2. At (4): If the holder is Psionic, every 3rd attack cleaves, dealing 75 physical damage to nearby enemies. Recommended users: Master Yi and Pyke. Ability Damage Cooldown: 0.75 seconds.
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- +15% AS
- +10% Omnivamp
Attack Champion: Dealing physical damage to an enemy reduces the target's Armor by 2. Magic Champion: Dealing magic damage to an enemy reduces the target's Magic Resist by 2. Recommended users: Master Yi and Pyke. Ability Damage Cooldown: 0.75 seconds.
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Every second, reduce the Armor of enemies within 2-hexes by 4, doubled for adjacent enemies.
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Attacks reduce enemy Armor and Magic Resistance by 1.
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Attacks reduce enemy Armor and Magic Resistance by 2.
Traits (1)
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Aatrox: Ally Damage 30% Shred and Sunders enemies Caitlyn: Grant allies 20% Attack Speed Akali: Allies gain Precision Maokai: Allies heal 12% max Health Kindred: Shield the strongest Tank for 800 Emblem: Allies deal 10% stacking bonus true damage
Frequently asked questions
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What is Sunder in TFT and how much Armor does it remove?
Sunder is the standard percent-Armor-reduction debuff: while a unit is Sundered, its Armor is reduced by a fixed percentage for the listed duration. The default value across most current item-applied sources is 30% Armor for 3 seconds, applied off attacks and Ability damage. Because the reduction is percentage-based rather than flat, it scales with the target's Armor pool — the more Armor the enemy has stacked, the more raw Armor is removed, which is why Sunder is the AD-side counter to heavy frontlines (mirroring Shred on the magic-resist side).
Sources
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Does Sunder stack from multiple sources?
No. The percent-Sunder keyword does not stack. When two Sunder sources hit the same target, only one application is active at a time — the strongest active debuff takes priority for its duration, rather than the percentages adding together. Item tooltips state this explicitly with "This effect does not stack." The practical consequence: doubling up Sunder items on the same carry doesn't double the Armor cut. The non-stacking clause matches Shred's behaviour on the magic-resist side and is Riot's standard treatment of these resistance debuffs.
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How is percent-Sunder different from flat Armor reduction?
They're separate keywords with different stacking behaviour. Sunder is percent-based — it removes a fraction of the target's current Armor and follows the "does not stack" rule. Flat Armor reduction subtracts a fixed number from the Armor stat and follows different stacking rules, even when its tooltip also reads "reduce Armor." Order of operations matters: flat reduction is calculated first, then percent Sunder operates on the remaining Armor. Stacking flat reduction in front of Sunder makes the percent step less impactful because it works against a smaller Armor pool.
Sources
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Where does Sunder come from in TFT — items, abilities, or traits?
All three. The most common source is item passives that Sunder on attack/Ability damage (the percent-Armor-reduction items players build for AD-heavy boards), but specific champion abilities and trait actives also apply Sunder, with values and durations that vary per source and per patch. Augments and charms can grant Sunder as well. Functionally, the Sunder keyword behaves the same regardless of source — it's the application duration, percent, and trigger condition that differ. Always check the source's own tooltip for the exact value and timing on the current patch.
Sources
- Last Whisper (TFT) — League of Legends Wiki (item-applied Sunder) (opens in new tab)
- Utility Sources — Burn, Shred, Sunder, Stun and more — LeDuck (Tacter, lists item/ability/augment Sunder sources) (opens in new tab)
- Adverse Effects in TFT Set 14 — Tacter (per-champion percent and flat sources) (opens in new tab)
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If Sunder is reapplied while it's already active, what happens to the duration?
The strongest active Sunder takes priority for its remaining duration — applying the same percent again doesn't add a second instance, and a weaker reapply won't override a stronger one already running. In practice, two carries each running 30% Sunder aren't better than one — only one debuff is active at a time. The exact "does the timer refresh on each tick" detail is not officially documented; community-observed behaviour is that continuous attack uptime from a Sunder source keeps the debuff applied through a fight.
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Can Sunder reduce a unit's Armor below zero in TFT?
No. TFT floors resistances at 0. Once Sunder and other Armor-reduction effects bring a target to 0 Armor, further reduction is wasted: incoming physical damage is fully unmitigated (effectively true damage), but it isn't amplified — the Armor reduction multiplier tops out at 1.0×. This is a deliberate divergence from base League of Legends, where negative Armor can amplify damage. TFT patched the behaviour around Set 9 (patch 13.16, August 2023) so a specific carry's Armor reduction could no longer push the stat below 0; the 0-armor floor remains in place on the current patch.
Sources
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What's the difference between Sunder and Shred?
They're mirror keywords on opposite resistances. Sunder is the percent-Armor reduction debuff — it amplifies physical (AD) damage by lowering the target's Armor. Shred is the percent-Magic-Resist debuff — it amplifies magic (AP) damage by lowering MR. The default magnitude on item-applied sources is 30% on each, durations and stacking rules are analogous ("does not stack"), and the choice depends on the carry's damage type: Sunder for AD boards, Shred for AP boards. On mixed-damage boards, one of each is common since each only affects its own resistance.