Olaf can combine Berserker Rage, Vicious Strikes, and Ragnarok at low life to become deceptively strong.
The bonus healing granted by Vicious Strikes amplifies your Life Steal from all sources as well as heals from allies.
Make sure you always have enough health to survive Requiem, even if you have to go back to the base more frequently to heal.
Karthus can cast spells for a short duration after he is killed. Move away from his corpse to be safe.
The stats shown here clarify some important Olaf vs. Karthus matchup stats that may help you appreciate the differences and similarities between the two. As an example, Olaf’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Karthus’s KDA ratio of NaN, highlighting that Olaf may be more central to his team's team fighting potential than Karthus..
Olaf usually has a similar longest killing spree as his foe does. Commonly, he takes more damage than Karthus. This typically indicates different amounts of tankyness, yet it can also hint that the champion with more health has less mobility and thus is unable to flee from further damage when engaged or poked.
Both LoL champs are great champions. Both have their pros and cons. In the game's current meta, Olaf usually wins when taking on Karthus, with a 55.3% win rate. Thus, Olaf makes a fantastic counter for Karthus.
While Olaf does have a much higher win rate compared to Karthus, when facing one another, Olaf also has a much lower difficulty level that makes him a less time consuming champ to learn and master. You should be be fine when picking Olaf into Karthus.
Moreover, Olaf also has only a small amount of CC and other utility, a similar amount to Karthus. This often makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there is not one best champion in League of Legends, in Olaf vs Karthus matchups, Olaf is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your allies during team fights.
Olaf is a great counter for Karthus. Make sure you focus your actions on keeping up your gold and cs and taking out objectives. If you can do that, you should be able to stand on your own as Olaf against Karthus.
If you would like to learn all of the intricacies of Olaf to counter Karthus during both the laning 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 mind the build and tips shown here, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Olaf on average gets a similar amount of CS relative to Karthus. Champions who typically don't take much CS usualy don't have to have much CS to be effective, such as support champions. These kinds of champions are capable of scaling properly off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, often need several high cost items to be effective. In either situation, try to exceed the numbers displayed here to do well.
The most crucial items to prioritize in your Olaf versus Karthus build include Immortal Shieldbow, Infinity Edge, and The Collector. When Olaf used at least these three pieces in his build, he performed a lot better when fighting Karthus than with many other common counter builds. In fact, Olaf had an average winrate of 55.3% when countering Karthus with this build.
To have the best chance of crushing Karthus as Olaf, Olaf players should equip the Conqueror, Triumph, Legend: Alacrity, Last Stand, Biscuit Delivery, and Approach Velocity runes from the Precision and Inspiration rune sets. Of all the rune sets players used for Olaf vs Karthus counter picks, this sequence of runes resulted in the greatest win rate. Notably, these runes averaged a 55.3% winrate overall.
If you need to get Olaf vs Karthus tips and counter builds for a a specific division, feel free to select one from the selection menu displayed above. If viewing for the first time, the stats and build suggestions given are calculated using every match with data with both champions.