Introduction

Welcome to the build guide for Sejuani, The Winter's Wrath.
Sejuani is a new exciting tanky support, but with some old style abilities. But with alot off cc and a big health pool she's a force to be reckoned with. She's also a quiet efficient jungler, but in my opinion she excels at a solo lane.
Pros/Cons
Pros
Awsome CC
A great farmer with Northern Winds
Can disrupt an intire team with her ultimate and pick out prio targets
Good jungling&ganking potential (not covered in this guide)
High damage output along with high survivability in late game
She's riding a big warthog!
Cons
Prone to harassment
Vulnerable to CC
Low damage output early game
Quite long CDS
Masteries
Masteries are focused primarly on defense and and along with 'Initator' i choose to go into the utility tree for more movement speed, and points in Vigor for a bit of health regen boosting your early game laning. Also going with the hp in the defensive tree also boost your Northern Winds AoE slightly.
Skill Sequence
I start off with maxing Northern Winds for the farming potentian and the awsome steady damage AoE output it creates in teamfights.
Arctic assault i take a point and lvl 2 and max it last only and not using it for damage rather for it's movement utility creating a roaming/chase down/escape tool.
Permafrost is my second skill i deside to max for it's useful farming capabilities and superior slow and and a small damage (can be very handy to finish off a fleeing opponent who for examples flashes along with your frost applied to them).
Ultimate i take of course at 6, 11 and 16.
Items
This build creates a tanky support Sejuani but with a steady damage output with Atmas, it focuses primarly on a AD orientated team.

I start with a health regeneration pendant and then quickly build to a Philosophers stone for the good regeneration effects, giving me plenty off health and mana to sustain in my lane. And a nice GPM buff

For boots i choose Mercury's Threads for the CC reducting stat 'Tenacity' Which i don't find any other item that gives this stat suitable for Sejuani.
Other choice:

If the opposing team lack AP or CC, you can pick these boots as of the next patch these will still be viable with a 10% auto attack damage reduction.

Depending on the opposing teams setup i rush Sunfire cape for a nice aoe damage along with northern winds, if the opposing team is AP orientated i would go for banshee's before hand.

For more hp preparing for randuin's omen, if opposing team is AD orientated you can choose to build Randuin's omen earlier. I also choose to buy this item because for the GPM buff after i built my Stone into Shurelya's Reverie.

I complete Shurelya's for a awsome support ability, giving your team a 40% for 3 seconds every minute, giving your team/you a chance to chase down opponents/escape. Also brings plenty of hp and regeneration effects along with a nice CD reduction.

This beauty will give us more armor, crit and 2% of our massive health pool added to our attack damage and with that giving us a bigger damage output. This will make us into a real threat. You can choose to complete this item later if opposing team is AP orientated.


Gives you more magic resistance and a nice spell shield with a 45 second cooldown that blocks any spell effect cast on you. This can be replaced for Force of nature if the opposing team lacks CC (or a karthus :D)

As my last item i choose to complete my heart of gold into a Randuin's Omen, for even bigger cc capabilties, HP/HP Reg and armor along with a 20% chance for a slow and a Slow activation ability (along with Shurelya's Reverie) Which gives you and your team great supportive abilities.
Another note, i don't think you should sacrifice the item's ive shown for the compensation of CDR. Ask your jungler if it's okay to pickup the blue buff and if you have the money for it get Elixirs.