Hello everyone I'm ZeroHyuga, this is the first build I have decided to make. I'm new to making these builds so don't go too hard on me.

Sejuani can be a beefy tank while also dishing out a lot of damage. She has great intiation power with her q and r. Don't always rush in with your q though, if you can get close enough to auto attack so u can get your permafrost off thats great. Q then becomes a great escape tool. With her Ultimate wait untill the enemies are grouped up very heavily. Stuning all of them with it can sway a team fight greatly in ur favor. After your ult charge in and start unloading every thing targeting of course the most important people like carries or supports.

The runes I have chosen for Sejuani make her very tanky. The armor marks and seals make her a hard target to damage along with the magic resist glyphs. The health quints make up for not buying a dorans item. This helps with finishing philosophers stone quick to get that extra gold.

The masteries I chose make her even more tanky. Combined with the runes she can survive a good deal of damage early on.

The items I get for Sejuani may not be your typical tank items but I find them very useful.
Mecury Treads help her with her mr and tenacity makes sure shes always doing something in fights. The 3 items I find I must have for tanks are Shurelyas, Frozen Heart, and Force of Nature. The 40% cooldown is very useful, I mean why wouldnt it be. Shurelyas can help initiate or escape if needed. Frozen heart and Force of Nature give you major amount of armor and mr. The last two items you can get are yours to choose. I recomend a sunfires and frozen mallet that gives you more beefyness and more crowd control. If you prefer something else an abysal scepter is also a good choice or a randuins omen.

This skill order is focused on masxing out Sejuani's crowd control. Permafrost is an amazing slow that can lock down targets for teamates. Add that with the cooldowns and you're slowing people all the time.

If anyone can give me some pointers on how to make my builds better I would be very greatful. I want to plan to start to make more if I can and your feedback will help very much.