Position yourself next to walls to bait your enemies into getting stunned by your ultimate.
Know your strengths! Mini Gnar is fast, squishy, and has high sustained damage. Mega Gnar is slow, tough, and has high burst.
Managing your Rage is very important. Try to time out your transformations so you can get maximum benefit from both forms.
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 stat comparisons shown on this page show some vital Gnar versus Karthus matchup stats that can help you interpret the differences between this pair of champs. For instance, Gnar’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Karthus’s ratio of NaN, indicating that Gnar may be more central to his team's team fighting effectiveness than Karthus..
Gnar often has a slightly smaller longest killing spree than his opponent does. Commonly, he takes a similar amount of damage to Karthus. This commonly reflects differing health capacities, but it can also indicate that the champ with higher health has less agility and thus is unable to kite away from further harm when poked or engaged.
Both League of Legends champions are great champions. Both have their pros and cons. In League's current meta, Gnar usually wins when trying to fight Karthus, with a 53.7% win rate. As a result, Gnar makes a great counter for Karthus.
While Gnar does have a higher winrate compared to Karthus, when they face off with one another, Gnar also has a greater learning curve that makes him a more challenging champion to learn and master. You don't need to be too worried when picking Gnar into Karthusas his relative depth means that you may not be able to unleash his full potential without a significant amount of practice beforehand.
Additionally, Gnar has some amount of CC and other utility, a similar amount to Karthus. This makes her just as valuable during teamfights, especially when fighting champions with a ton of burst damage.
While there is not one best champion in League of Legends, in Gnar vs Karthus matchups, Gnar 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.
Gnar is a great counter to Karthus. You will do well by focussing your gameplay on maximizing your CS and taking out objectives. If you do that, you should hold your own as Gnar against Karthus.
To learn all of the intricacies of Gnar to counter Karthus during both the early game 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 pay attention to the build and suggestions displayed here, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Gnar on average racks up more CS compared to Karthus. Champs who on average don't get many minion kills typically don't have to have much CS to be effective, such as sup champs. These kinds of champions are capable of scaling well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, typically have to have a lot of items to be effective. In either case, try to exceed the numbers reported on this page to do well.
The best items to have in your Gnar versus Karthus build include Sterak's Gage, Black Cleaver, and Trinity Force. When Gnar incorporated at least these three items in his build, he performed significantly better vs Karthus than with most other commonly used builds. In fact, Gnar had an average winrate of 53.7% when playing against Karthus with this counter build.
To have the greatest probability of crushing Karthus as Gnar, Gnar players should equip the Fleet Footwork, Triumph, Legend: Alacrity, Last Stand, Bone Plating, and Overgrowth runes from the Precision and Resolve rune sets. Of all the rune builds players picked for Gnar vs Karthus face-offs, this set of runes resulted in the greatest win rate. In fact, these runes gave a 53.7% win rate overall.
If you want to view Gnar versus Karthus tips and counter builds for a a particular skill level, feel free to select one from the selection menu shown above. If viewing for the first time, the stats and guides given are calculated using all rounds completed with both champs.