If you have trouble landing Prismatic Barrier, remember that it returns to you after it reaches max range. Try positioning yourself to hit your allies with its return trip.
Lux has great zone control abilities. Try to set up Lucent Singularity to prevent an enemy's advance or escape.
Lucent Singularity is a great scouting tool. Try throwing it into brush before walking into it to check for ambushes.
Dodging Arctic Assault and Glacial Prison can give you a huge advantage.
Focus on avoiding the second swing of Winter's Wrath which carries the brunt of the damage.
Melee enemies can also stack Frost for Sejuani, be very careful around them.
The stats shown on this page emphasize some critical Lux against Sejuani matchup statistics that may help you explain the distinctions between the two. As an example, Lux’s KDA ratio ([kills + assists] / deaths) of NaN is better than Sejuani’s KDA ratio of NaN, indicating that Lux may be more central to her team's team fighting effectiveness than Sejuani..
Lux typically has a similar longest kill spree as her opponent does. On average, she receives less damage than Sejuani. This often reflects different amounts of tankyness; however, it can also imply that the one champ has less agility and thus is not able to flee from additional damage when engaged or poked.
Both League of Legends champions are great champions. Both have their pros and cons. In the game's current meta, Lux usually wins when taking on Sejuani, with a 52.7% win rate. Therefore, Lux makes a good counter for Sejuani.
While Lux does have a higher win rate than Sejuani, when on opposite teams, Lux also has a greater learning curve that makes her a more complex champion to develop with. You don't need to be too worried when picking Lux into Sejuani.
Moreover, Lux also has a good amount of CC and other utility, a similar amount to Sejuani. This often makes her just as valuable during team fights, especially when trying to counter champions with a ton of burst damage.
While there is not a single best champion in League of Legends, in Lux vs Sejuani matchups, Lux is the better champion with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your allied champions during team fights.
Lux is an above average counter for Sejuani. Focus your play on keeping up your CS and clearing objectives. If you are able to do that, you should do very well as Lux against Sejuani.
To learn all of the intricacies of Lux in order to counter Sejuani during both the laning and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tips and tricks for this matchup. If you listen to the build and suggestions shown above, you should grow your win rate by a lot and be that much closer to League of Legends pro players.
Lux typically picks up more CS compared to Sejuani. Champs who on average don't earn much CS typically don't have to have much CS to be effective, such as support champions. They are capable of scaling well off of their skills, stats, and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often require several high cost items to be effective. In either case, try to surpass the numbers shown on this page to do well.
The most crucial items to use in your Lux versus Sejuani build include Zaz'Zak's Realmspike, Horizon Focus, and Stormsurge. When Lux combined at least these three items in her build, she performed a lot better vs. Sejuani than with most other typical item sets. In fact, Lux had an average winrate of 52.7% when playing against Sejuani with these items in her kit.
To have the best likelihood of defeating Sejuani as Lux, Lux players should equip the Arcane Comet, Manaflow Band, Transcendence, Scorch, Cheap Shot, and Ultimate Hunter runes from the Sorcery and Domination rune sets. Out of all the rune sets players used for Lux vs Sejuani matchups, this blending of runes resulted in the greatest win rate. Notably, these runes provided a 52.7% win rate overall.
By default, tips, statistics, and builds on how to beat Sejuani as Lux are presented for all ranked divisions. If you would like to narrow the statistics and builds to a specific skill level, you should use the selection menu earlier on the page.