Hello, My In Game Name is LegendaryBladeG and i play on the NA servers. I made this guide simply because i am a Sejuani main and i have been playing her Top recently just for fun and i found that it actually works pretty well, This particular build is a late game teamfighting build.

Pros

+ Lots Of CC + Very Strong Teamfighter + Your W does percent max health damage + Ult is good For engage and Disengage

Sejuani has built in disengage and engage with both her Arctic Assault and Glacial Prison. your late game combo in my opinion would be Glacial Prison-> Arctic Assault-> Flail of the Northern Winds-> Permafrost

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Cons

- Very weak early game - If your Arctic Assault hits a enemy you lose your only escape tool - Cant 1v1 very well without Glacial Prison

Essentially you need to play safe with Sejuani until your able to 1v1 your laner (typically level 6) but until then you need to farm as much CS as possible to get ahead or else you will be detrimental to your team

For runes i take Greater Mark of Attack Speed for my reds because i find that Sejuani has trouble last hitting without it, as for yellow and blue runes i take 5 Greater Seal of Armor and Greater Glyph of Magic Resist then 3 Greater Seal of Scaling Armor and Greater Glyph of Scaling Magic Resist, and for quints i go with Greater Quintessence of Ability Power since the damage helps with actually killing your lane instead of just getting them low

These masteries are pretty standard on Sejuani focusing the Resolve Tree for tank stats and the Ferocity Tree for damage and lifesteal. The only debatable mastery is the keystone because Grasp of the Undying gives sustain in fights Strength of the Ages gives more health and healing after it reaches its cap or Bond of Stone because of damage reduction

Focus on farming minions with Flail of the Northern Winds and Permafrost if the lane opponent gets aggressive use your Arctic Assault under turret to punish them you shouldnt have any problems unless they are a good champion for diving turrets and/or dodging your abilities

Note: Only use Glacial Prison during laning phase if you get stuck in a 2v1, 3v1, etc.

I hope you enjoyed this build for Sejuani! If you have any questions just ask me, i check this guide often to see if anyone has questions!