Lay Waste is very strong at farming minions and harassing enemy champions.
Ask your allies to help point out when you should use Requiem to get kills in different lanes.
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.
The Karthus Gnar synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Gnar, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Karthus sees a large worsening in his KDA (ratio of kills and assists to deaths) when paired with Gnar. His KDA worsened from NaN to NaN. This negative change shows that Gnar helps Karthus perform not as well in competitive League of Legends games. Yet, the small difference demonstrates that this performance change is only marginal.
When Karthus tries to synergize with Gnar, he observes a little increase in his total damage output. This difference could indicate that Gnar supports by providing protection for him to deal more damage or that his allyship also helps extend the round's duration. Similarly, when Karthus is played together with Gnar on the same team, he usually scores many fewer killing sprees than when he plays alone. This is contrasting evidence that he is worse when playing alongside Gnar.
Moreover, when Karthus plays with Gnar on the same side, he typically takes a little more damage than when he plays alone. Taking more damage could mean that Gnar does a poor job of protecting Karthus in team fights.
There is no perfect companion for Karthus that will no matter what be his best ally. However, overall, Gnar is a not very good teammate for Karthus. By locking into the same side as Karthus, he decreases their win rate by -2.1% to 45.2%. This shows that there is a harmful strategic relationship between Karthus and Gnar that allows them to perform not as well together than without each other.
Gnar has a greater difficulty than Karthus. That means Karthus players should be careful when arranging Gnar teammates to fight alongside, as they will need a greater level of skill to be able to do well with you.
Playing on the same side, Karthus players will likely observe an overall large increase in your team’s capacity to deal magic damage. Together, these two can blast through enemies with magic damage.
Conversely, by aligning Karthus and Gnar together, you will not be granting your side very much tankyness. We recommend you pick other champions on your team that nullifies this disparity in their kit.
Regardless of your Gnar ally's ability, you should focus on maximizing your gold income, outlasting your enemies, and clearing objectives. If you do this, you will do well anyway.
If you would like to learn all of the intricacies of Karthus in order to pair well with Gnar during both the laning and mid / late game phases of League, you should keep reading to pick up a few extra tricks and insights into this champion pairing. If you pay attention to the build and suggestions presented above, you will increase your win rate by a lot.
The most important items to have in your Karthus and Gnar synergy build consist of Rabadon's Deathcap, Malignance, and Liandry's Torment. When Karthus combined at least these three finished items in his build, he performed much better when paired up with Gnar than with most other commonly used builds. In fact, Karthus boasted an average winrate of 45.2% when playing alongside Gnar with these items in his kit.
To have the best chance of annihilating your oponents, Karthus players should equip the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Eyeball Collection, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Of all the rune sets we have analyed for Karthus and Gnar pairings, this combination of runes yielded the highest win rate. Notably, these runes provided a 45.2% win rate overall.
By default, tips, statistics, and builds on how to synergize Gnar with Karthus are shown for every ranked division. If you would like to scope the statistics and builds to a specific division, you can use the selection menu earlier in the counter matchup guide.