Hello, this guide will show you how to win almost every teamfight cause of sejuani's disrupting potencial. I prefer her to be in top lane instead of jungle, cause she is not a fast jungler like skarner, udyr or lee sin who can finish and gank (if needed) really quickly.

Pros

-Can sustain a lot of damage
-Disrupt enemy team and slay squishies
-Her skills can help her escape
-One of the best ultis in the game
-Really strong late game
-Easy and fun to play

Cons

-Needs to farm a lot
-Prepare for a lot of assists
-Needs a good team (this especially...)
-Big cooldowns
-She is weak early game (low damage output, poor sustainability...)
-Slow jungler right now...

I use a classic ap tank pick in runes. You can change the quintessences to get more movement speed, more health, more armor or magic resist per level though i think its more balanced the way i have them.

For masteries in the defensive tree i aim for health, resistances and cooldown reduction instead of movement speed since you can initiate easily with arctic assault and force of nature's extra speed.

First Item

You can pick regrowth pendant and upgrade it to philosopher's stone which is an item that keeps the gold flowing and will let you sustain damage and stay in the lane for a long time till you go back to get boots.

Alternatively, pick doran's shield. This can help you in early game but you won't have the gold flow that philosopher's stone has and can slow down your core item building.

Boots

After the first item, mercury's treads is one of the best choices especially if the enemy team has heavy cc.

Alternatively for heavy ad champs with standard attacks (or if you dont want to waste some more gold for better boots) you can pick ninja tabi.

Core Items

Rod of ages, Frozen Heart and Force of Nature.

You can change the order of building them depending on the enemy team but to be able to be tanky and deal significant damage you need all of them.

Finishing Items

Rylai's Crystal Scepter will give you that extra health and ability power (dont forget the aoe slow) you need, since you already take like 70% reduced attack damage and 65% reduced magic damage because of the previous items and runes.

Sunfire Cape provides you with even more Health and even more damage per second ( enemies will be sticking for a long time around you so it's nice to burn them along with the chilling)

Alternative Finishing Items

Depending your enemies and what you want next you can try out these items!

Heavy cc, Annoying ultis? Grab Quicksilver Sash, and negate stuns, slows etc. and ultis like Warwick's, Malzahar's, Skarner's, Vladimir's and many more.

Want to focus slowing a lot one opponent at a time, get Frozen Mallet, though i would prefer Rylai's.

Will of the ancient's can make you really hard to die, and you can boost your teammates.

Rabaddon's Deathcap if you want to deal more magic damage.

Morrelo's evil tome gives nice cooldown reduction.

More ability power and magic resist while decreacing enemy resistances? Abyssal Scepter!

Flash is one of the summoner spells i pick almost every time, it can be used for offence, defence, escape, initiation... great tool.

Ignite can help you get kills easier and reduce the regeneration of annoying champs like volibear or swain. You can even use it to reduce the regeneration of baron nashor and kill him faster!

Cleanse is another viable pick and should be picked instead of ignite if your enemy team has heavy cc.

Take Ghost if you feel like you need it more than flash.

You are ready to get into a team fight. When the enemies are together and close to each other use your ultimate and get into the fight with Arctic Assault. Head to the enemy ranged or carries and take out or disrupt those squishies, your team and you must have taken everyone out with no casualties.

If the enemy team has a lot of ranged, charge in and get close to those ranged use ulti on them, kill them with your team.

Always try to be close to your enemies to inflict damage with northern winds and slow your opponents.
Hit and run! hit and run! Charge in again. All dead!

Sejuani is an ap tank that specializes in disrupting enemy movement. Go WITH your team, initiate, disrupt, assist, save and win!

This was my first guide, i believe i did well and that you will enjoy trying my build. Give it a try and vote!