My first build. Now that season 7 has end which is my first season in league, I have played Sejuani since before her rework, maining her throughout the season. I'll keep adding on to this build in the future.

As a tank your primary skill tree will be Resolve. Making you the front line of every battle. Aftershock is the best keystone for Sejuani as it provides a small burst of damage along with increased Armor and Magic resistance, great for engaging the enemy. Next for runes would be Font of Life, everything in your kit can impair movement. This is a good rune as it will heal your team during fights. Conditioning is the best rune on this line as it helps with mid to late game fighting. The other two runes on this line are kind of useless as only heals can proc the bonus 5% and its only temporary, were as Conditioning is permanent throughout the game. Overgrowth is helpful when going to late game when you have a full build but need to get a bit more tanky. Winter's Wrath scales with health which will give it a nice damage boost.

Domination Will be your second skill tree. Cheap Shot deals true damage to enemy's with impaired movements. Once again everything in your kit impairs movements which means this will proc often. Lastly Relentless Hunter, while Sejuani is a tank she hurts quite a bit. Getting kills allows you to move around the map quicker, push lanes and regroup with your team ASAP.