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.
Karthus can cast spells for a short duration after he is killed. Move away from his corpse to be safe.
Make sure you always have enough health to survive Requiem, even if you have to go back to the base more frequently to heal.
The stats provided here highlight some critical Lux vs. Karthus counter statistics that can help us explain the differences and similarities between the two. Lux’s KDA ratio ([kills + assists] / deaths) of NaN is better than Karthus’s KDA ratio of NaN, demonstrating that Lux may be more central to her team's team fighting capacity than Karthus..
Lux often has a slightly smaller longest kill spree than her opponent does. On average, she takes less damage than Karthus. This typically indicates different amounts of tankyness, but it can also illustrate that the champion with more health has less agility and thus is unable to kite away from further damage when engaged or poked.
Both League champs are great. Both champs have their strengths, weaknesses, and counters. In League's current meta, Lux usually wins when taking on Karthus, with a 53.5% win rate. Therefore, Lux makes a great counter to Karthus.
While Lux does have a higher win rate than Karthus, when on opposite teams, Lux also has a lower learning curve that makes her a less complex champion to develop with. You don't need to be too worried when picking Lux into Karthus.
Additionally, Lux has a good amount of CC and other utility, a similar amount to Karthus. This makes her just as valuable during team fights, especially when facing champions with a ton of burst damage.
While there isn't a single best champion for every situation in League of Legends, in Lux vs Karthus matchups, Lux is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your teammates during team fights.
Lux is a great counter to Karthus. Focus your tactics on keeping up your gold and cs and taking out objectives. If you do that, you should do very well as Lux against Karthus.
If you would like to truly master Lux to counter Karthus during both the lane and mid / late game phases of League of Legends, you should continue reading to learn a few extra lessons on this matchup. If you mind the build and stats presented above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Lux often gets a similar amount of CS compared to Karthus. Champs who typically don't earn much CS usualy don't need much CS to be valuable teammates, such as supports. They are capable of scaling well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, usually have to have many items to be effective. In either case, try to surpass the numbers reported on this page to do well.
The top items to prioritize in your Lux versus Karthus build include Rabadon's Deathcap, Shadowflame, and Stormsurge. When Lux used at least these three pieces in her build, she did a lot better versus Karthus than with most other typical counter builds. In fact, Lux had an average winrate of 53.5% battling Karthus with this counter build.
To have the greatest chance of vanquishing Karthus 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. Of all the rune combinations we have analyed for Lux vs Karthus LoL games, this blending of runes yielded the best win rate. Notably, these runes averaged a 53.5% win rate overall.
If you need to get Lux x Karthus tips and matchup stats and build suggestions for a an individual skill level, please choose one from the selection menu displayed above. At first, the stats and build suggestions given are calculated using every match completed with both champions.