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Matchup

Sejuani
Sejuani
45%
55%

vs

50.0%
Irelia
Irelia
58%
42%
Heavy AD damageSustained DPSDive threatSplit push

Build vs Irelia

Build adapted to this matchup

Starting items

Mosstomper Seedling
Health Potion

Core build

Heartsteel
1Survival
Thornmail
2vs Hybride
Sunfire Aegis
3vs AD

Standard

Boots of Swiftness
4vs Slow
Unending Despair
5vs AD

Summoner spells

411100%

Anti AD

Plated Steelcaps
4vs AD
Unending Despair
5vs AD
Randuin's Omen
vs AD
Dead Man's Plate
vs AD

Anti AP

Mercury's Treads
4vs CC
Jak'Sho, The Protean
5vs Hybride
Kaenic Rookern
vs AP
100.0% WR1 games
ResolveResolve
AftershockAftershock
Font of LifeFont of Life
ConditioningConditioning
OvergrowthOvergrowth
PrecisionPrecision
Legend: AlacrityLegend: Alacrity
TriumphTriumph
Attack SpeedHealth ScalingHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
SejuaniSejuani
IreliaIrelia
Passive
Favorable
Favorable

Irelia's abilities

Passive, spells and ultimate

Ionian Fervor (P)

When Irelia strikes enemies with spells she gains stacking bonus Attack Speed. At maximum stacks she also gains bonus damage on hit.

Cooldowns

Cooldowns by spell rank

LevelQWER
310s20s16s–
68s20s16s2m05
96s18s16s2m05
116s16s16s1m45
166s12s13s1m25
186s12s10s1m25

Playing against Irelia

How to counter and exploit weaknesses

1

Don't stand next to your low-HP minions: Irelia can Q reset through them to gap-close on you.

2

If Irelia doesn't have her 4 passive stacks, she's much weaker — fight her when she doesn't have stacks.

3

Her E (stun) has two parts: you can see the first blade and anticipate the second. Move as soon as you see the first one.

4

Ranged champions with CC counter her: she's weak if she can't dash through minions to get close.

Source: op.gg + LTL Engine · Patch 16.9.1 · May 9, 2026