Lethality is a stat that ignores a flat amount of the enemy's armor. It's strongest against low-armor targets: a single lethality item can increase your damage against a squishy mage by 16%, but only by 5% against a tank. That same math works in reverse: buying even cheap armor early is the most effective counter to a lethality spike. The other counter is macro: lethality assassins need isolated picks, so grouping shuts them down. Item builds and counter strategy below.
How Lethality Works
Each point of lethality ignores one point of the target's armor. 18 lethality means the target is treated as having 18 less armor for your damage calculation. Their actual armor doesn't change; only the damage you deal to them is affected.
Lethality cannot reduce a target's armor below 0. If a target has 20 armor and you have 30 lethality, they're treated as having 0 armor, not -10. (Flat armor reduction from abilities like Nasus E can push below 0, but lethality cannot.)
Lethality used to scale with your champion's level, but that was removed in patch 14.1. It now grants its full value at all levels.
Lethality vs. Armor: Damage Table
The table below shows what percentage of your physical damage gets through at each armor level. Higher means more damage.
| Enemy Armor | 0 Lethality | 30 Lethality | 35% Armor Pen |
|---|---|---|---|
| 0 | 100.0% | 100.0% | 100.0% |
| 30 | 76.9% | 100.0% | 83.7% |
| 50 | 66.7% | 83.3% | 75.5% |
| 80 | 55.6% | 66.7% | 65.8% |
| 100 | 50.0% | 58.8% | 60.6% |
| 150 | 40.0% | 45.5% | 50.6% |
| 200 | 33.3% | 37.0% | 43.5% |
| 300 | 25.0% | 27.0% | 33.9% |
At 30 armor (a typical mage with no armor items), 30 lethality takes them to 0 effective armor and you deal full unmitigated damage. At 300 armor (a full-tank Malphite), the same 30 lethality only moves you from 25% to 27%. That's why lethality is an assassin stat, not a tank-shredding stat.
The rightmost column shows 35% armor penetration (Lord Dominik's Regards) for comparison. Lethality wins against low armor. Percent penetration wins against high armor. The crossover is around 100-150 armor.
Lethality vs. Percent Armor Penetration
- Lethality (flat): Ignores a fixed amount of armor. Best against low-armor targets.
- Percent armor penetration (Lord Dominik's Regards, Black Cleaver): Ignores a percentage of armor. Better against high-armor targets.
If you're an assassin targeting carries, build lethality. If the enemy team has 2-3 tanks stacking armor, build percent armor penetration instead, or both.
All Lethality Items (2026)
| Item | Gold | Lethality | AD | Other |
|---|---|---|---|---|
| Bastionbreaker | 3,200 | 22 | 55 | 15 Ability Haste |
| Umbral Glaive | 2,800 | 18 | 60 | 15 Ability Haste |
| Hubris | 2,800 | 18 | 60 | 10 Ability Haste |
| Youmuu's Ghostblade | 2,800 | 18 | 55 | 4 Move Speed |
| Axiom Arc | 2,750 | 18 | 55 | 20 Ability Haste |
| Profane Hydra | 2,850 | 18 | 55 | 10 Ability Haste |
| Voltaic Cyclosword | 3,000 | 18 | 55 | 10 Ability Haste |
| Opportunity | 2,700 | 18 | 55 | - |
| Serpent's Fang | 2,500 | 15 | 55 | - |
| Edge of Night | 3,000 | 15 | 50 | 250 Health |
| The Collector | 3,000 | 10 | 50 | 25 Crit Chance |
Most items share a similar lethality and AD baseline. The differentiator is the passive effect:
- Bastionbreaker — highest lethality of any item; also shreds shields
- Umbral Glaive — reveals and one-shots wards
- Hubris — bonus AD on takedowns — snowball item
- Youmuu's Ghostblade — move speed active for roaming and engaging
- Axiom Arc — refunds ultimate cooldown on kills
- Profane Hydra — waveclear active for split-pushers
- Voltaic Cyclosword — empowered attack synergy for auto-weaving champions
- Opportunity — bonus lethality when out of combat — flanking and surprise engages
- Serpent's Fang — reduces enemy shields — counters Lulu, Karma, Locket
- Edge of Night — spell shield + bonus HP for survivability
- The Collector — crit + lethality hybrid for ADCs; executes low-HP targets
When to Build Lethality
Build lethality when the enemy team is squishy (3+ carries with no armor items), you're playing an AD assassin or caster (Zed, Talon, Qiyana, Kha'Zix), or you want to spike in the mid-game before enemies can itemize armor.
Don't build lethality when the enemy team is stacking armor (Plated Steelcaps, Frozen Heart, Randuin's Omen) or you're an auto-attack ADC who scales better with crit and attack speed.
How to Counter Lethality
Lethality punishes low-armor targets. The two real counters are: buy armor early, and don't give assassins isolated 1v1 fights.
Buy Armor Early
Armor is most efficient when you have the least of it. Going from 30 to 45 armor — one Cloth Armor (300g) — reduces the assassin's physical damage against you by 10%. Adding that same 15 armor when you're already at 200 base reduces damage by under 2%. Early cheap armor is disproportionately good against a lethality assassin who spikes in the mid-game.
What to build by role:
- Plated Steelcaps (1200g, +25 armor) — boots; also reduces all incoming basic attack damage by 10%
- Seeker's Armguard (1600g, +25 armor) — mid lane mage component; builds into Zhonya's Hourglass
- Thornmail (2450g, +75 armor, +150 HP) — also returns damage and applies Grievous Wounds when hit by basic attacks
- Frozen Heart (2500g, +75 armor) — also reduces attack speed of nearby enemies by 20%
- Randuin's Omen (2700g, +75 armor, +350 HP) — also reduces incoming critical strike damage by 30%
- Zhonya's Hourglass (3250g, +50 armor) — Stasis active (2.5s untargetable, 120s CD) lets you survive the combo window
Some ADCs (Kog'Maw, Vayne) can also fit a Randuin's Omen into their build without losing much damage. Mid laners can similarly fit Zhonya's into almost any AP build — the Stasis active is often more valuable than the armor itself.
Don't Get Caught Alone
Itemization is the laning answer. Macro is the mid-to-late game answer.
Lethality assassins are pick champions. Their kits are designed around killing a single isolated target before anyone responds. In a 5v5 team fight, most assassins (Zed, Talon, Qiyana) have weak sustained damage and no reliable way to affect multiple targets at once.
If the enemy has a fed lethality assassin:
- Group around objectives (dragon, baron, towers) instead of splitting or roaming alone
- Move as a unit through the mid-game so they can't find a 1v1
- Force 5v5 teamfights — this is the game state where lethality is least effective and the assassin has the least impact
Buying armor buys you time. Forcing teamfights denies them the game entirely.
