Matchup

Heavy CCVery tankyStrong engage

You are stronger late game — farm safe and avoid early trades.

Build vs Sejuani

Build adapted to this matchup

Starting items

Doran's Ring
Health Potion
x2

Core build

Tear of the Goddess
1
Blackfire Torch
2Mage
Liandry's Torment
3Mage tank

Standard

Sorcerer's Shoes
4Magic pen
Seraph's Embrace
5Mage

Summoner spells

41287%
3413%

Anti AD

Plated Steelcaps
4vs AD
Zhonya's Hourglass
5vs AD

Anti AP

Mercury's Treads
4vs CC
Banshee's Veil
5vs AP

Anti Tank

Void Staff
5vs Tank
Cryptbloom
vs Tank
Shadowflame
vs Tank

DPS

Seraph's Embrace
Mage
Rabadon's Deathcap
Mage
Luden's Echo
Mage

Other options

Rod of Ages
HP
Dark Seal
100.0% WR1 games
InspirationInspiration
First StrikeFirst Strike
Magical FootwearMagical Footwear
Biscuit DeliveryBiscuit Delivery
Cosmic InsightCosmic Insight
SorcerySorcery
TranscendenceTranscendence
Manaflow BandManaflow Band
Ability HasteAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
VeigarVeigar
SejuaniSejuani
Careful
Careful
Aggressive

Sejuani's abilities

Passive, spells and ultimate

Fury of the North (P)

After being out of combat, Sejuani gains Frost Armor which grants Armor and Magic Resist and immunity to slows. Frost Armor persists for a short time after Sejuani takes damage. Sejuani can damage a stunned enemy to shatter it, dealing massive magic damage.

Cooldowns

Cooldowns by spell rank

LevelQWER
318s9s1.5s
615s9s1.5s2m
912s8s1.5s2m
1112s7s1.5s1m45
1612s5s1.5s1m30
1812s5s1.5s1m30

Playing against Sejuani

How to counter and exploit weaknesses

1

Sejuani needs 4 frost stacks to stun — don't stay in range of her extended autos.

2

Her Q is a slow and predictable dash — sidestep or Flash the knockup.

3

She's weak in 1v1 but excels in teamfights — invade her early in the jungle when she's vulnerable.

4

Tenacity reduces the duration of her many CCs — buy Tenacity if you're frontline.

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