Defensive & situational items in LoL: when to buy each one
Damage fills the screen, but many games are won with a timely defensive buy. The right resistance item, an active that makes you untouchable for two seconds, or an anti-heal piece, turn a losing fight into a win. Here you see when to detour and why defense pays off more than it looks.
Defense multiplies: health and resistances
Armor and magic resist don’t “subtract” damage: they give you effective HP (EHP). Every 100 resistance makes your health perform as if you had double it against that damage type. That’s why health and resistance multiply each other: 1000 health with 100 armor tanks twice the physical hits of 1000 health alone. The table shows it point by point.
The key is buying the resistance that matches the damage killing you. If the enemy team deals physical damage, armor; if magic, magic resist; if mixed, a bit of each beats stacking one (covered in health vs resistances).
Typical items: vs physical, Thornmail (also cuts healing), Frozen Heart or Dead Man’s Plate; vs magic, Spirit Visage, Kaenic Rookern or Randuin’s Omen vs crit. Test how much EHP each gives in the mitigation lab.
| Armor | Reduction | Damage from 1000 | EHP with 2000 HP |
|---|---|---|---|
| 0 | 0% | 1000 | 2000 |
| 25 | 20% | 800 | 2500 |
| 50 | 33.3% | 667 | 3000 |
| 100 | 50% | 500 | 4000 |
| 150 | 60% | 400 | 5000 |
| 200 | 66.7% | 333 | 6000 |
| 300 | 75% | 250 | 8000 |
The mitigation engine with the real formula: damage taken = damage × 100 / (100 + armor).
Actives that win the fight on their own
Some items don’t give stats: they give a button that changes the fight. Zhonya’s Hourglass freezes you in stasis for 2.5 s: untargetable and invulnerable, but unable to act. You use it to skip the enemy’s burst window (wait out their combo and come out alive).
Guardian Angel revives you for 4 s after dying and heals 50% of your base health on return (300 s cooldown). Buying it before a key fight can hand you a “second life” that decides the teamfight; it’s a costly gamble if you buy it late and never get the revive off.
Mercurial Scimitar / Quicksilver Sash cleanses all crowd control (except airborne) on use: your exit against a hook or a suppression (Malzahar, Warwick). Against heavy magic damage it also gives magic resist. When to buy each depends on what’s killing you, not a fixed order.
Zhonya 2,5 s estasis · Ángel Guardián revive 4 s + 50% vida base (300 s) · Mercurial limpia CC salvo derribo (90 s) Cutting sustain: Grievous Wounds
Against champions who heal (Aatrox, Soraka, Vladimir, a sustain Mundo), pure defense isn’t enough: you have to cut the healing. Grievous Wounds reduces all healing received by 40%, applied by cheap items you already wanted: Bloodletter and Oblivion Orb for magic damage, Collector or Chempunk or Thornmail for physical.
The rule: if the enemy lives by healing, an anti-heal piece on time is worth more than another damage item, because you rip out the engine keeping them alive. Buy it early against heavy sustain, not once they’ve already won the fight.
The breakdown of each item and how much real healing it removes is in healing and anti-heal.
You don’t need the full item: the cheap component already applies 40%. Pick by your damage type. Tap any to see its page and gold efficiency.
FAQ
When do I stop buying damage to buy defense?
When you die before you can deal damage. If what blows you up is physical, buy armor; if magic, magic resist. Because resistance multiplies with your health, a defensive piece on time usually wins more fights than an extra damage item: it lets you live to use the damage you already have.
Zhonya’s or Guardian Angel?
Zhonya saves you IN the fight: freezes you 2.5 s to skip the enemy burst and fight again. Guardian Angel saves you AFTER: revives you 4 s after dying. Zhonya shines if your problem is surviving a single combo (mages, assassins); GA, if you want a second life in a teamfight. Many AP carries take Zhonya; many divers, GA.
When do I buy Grievous Wounds?
As soon as the enemy lives by healing (Aatrox, Vladimir, Soraka, Mundo). They cut healing by 40% and come on cheap items you already wanted. Buying them early against heavy sustain often decides the lane or teamfight; late, it’s too late.