Melee allies can stack Frost for your Permafrost, keep an eye on who they are attacking.
Save Glacial Prison for encounters where you have teammates present to take advantage of it.
Use Arctic Assault to escape bad situations, interupt channeled spells or chase runners.
The stats shown here feature several significant Sejuani versus Lillia counter stats that may help you understand the differences between this pair of champions. As an example, Sejuani’s KDA ratio ([kills + assists] / deaths) of NaN is more than Lillia’s KDA ratio of NaN, showing that Sejuani may be more central to her team's team fighting capacity than Lillia..
Sejuani often has a significantly smaller longest kill spree than her enemy does. Typically, she receives less damage than Lillia. This is usually reflective of differing health capacities, but it can also imply that the one champion has less agility and thus is not able to kite away from further harm when poked or engaged.
Both LoL champions are great. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Sejuani usually loses when trying to fight Lillia, with a 39.0% win rate. Therefore, Sejuani makes a bad counter to Lillia.
While Sejuani does have a much lower win rate compared to Lillia, when facing one another, Sejuani also has a much lower level of difficulty that makes her a less difficult character to pick up and master. You should be very concerned when picking Sejuani into Lillia.
Additionally, Sejuani has a good amount of utility and CC, a similar amount to Lillia. This often makes her just as valuable during teamfights, especially when trying to counter champions with a ton of burst damage.
While there is not one best champion overall in League of Legends, in Sejuani vs Lillia matchups, Lillia is the better champ with a much lower win rate, less champion complexity, and a similar amount of utility to help out your team members during teamfights.
Sejuani is a terribly counter to Lillia. Focus your play on maximizing your CS and taking out objectives. If you can do that, you should do very well as Sejuani against Lillia.
If you would like to truly master Sejuani to counter Lillia during both the early game and mid / late game phases of League of Legends, you should continue reading to gather a few extra tips and tricks for this matchup. If you pay attention to the build and stats displayed above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Sejuani most often picks up a similar amount of CS relative to Lillia. Champs who on average don't earn many minion kills often don't require much CS to be effective, such as sup champs. These kinds of champions are capable of scaling properly off of their abilities and first items alone. Yet, champions with a lot of CS, such as hyper-carries, typically need many items to be effective. In either situation, try to do better than the values shown on this page to do well.
The most important items to use in your Sejuani versus Lillia build include Iceborn Gauntlet, Hollow Radiance, and Jak'Sho, The Protean. When Sejuani combined at least these three items in her build, she did significantly better versus Lillia than with many other common item sets. In fact, Sejuani had an average winrate of 39.0% battling Lillia with these items in her kit.
To have the greatest likelihood of vanquishing Lillia as Sejuani, Sejuani players should use the Aftershock, Font of Life, Conditioning, Overgrowth, Legend: Alacrity, and Triumph runes from the Resolve and Precision rune sets. Out of all the rune combinations players chose for Sejuani vs Lillia LoL games, this mixture of runes yielded the greatest win rate. In fact, these runes gave a 39.0% winrate overall.
If you would like to see Sejuani x Lillia tips and counter stats for a a distinct skill level, feel free to choose one from the selection menu shown above. By default, the stats and build suggestions given are computed using all games run with these champions.