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.
Udyr is one of the best junglers in the game. Taking advantage of this can give your team a large XP advantage and map control.
Damage is applied to turtle shield post-mitigation. Therefore, buying defensive items can drastically increase your survivability.
The Karthus Udyr synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Udyr, 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 Udyr. His KDA worsened from NaN to NaN. This drop shows that Udyr helps Karthus perform poorer in competitive League rounds. Yet, the small difference shows that this performance change is not very impactful.
When Karthus is an ally to Udyr, he sees a small increase in his full damage dealt. This difference may demonstrate that Udyr supports by providing cover for him to dish out more damage or that his support also helps increase the round's duration. Similarly, when Karthus is played together with Udyr on the same side, he usually scores many fewer killing sprees than when he plays on his own. This is contrasting evidence that he is worse when playing with Udyr.
Moreover, when Karthus plays with Udyr on the same team, he usually receives less damage than when he plays alone. Taking not as much damage may mean that Udyr does a decent job of protecting Karthus in teamfights.
There is no universally accepted best ally for Karthus that will no matter what be his best synergy. Yet, overall, Udyr is a very typical ally for Karthus. By locking into the same team as Karthus, he improves their win rate by 0.1% to 47.4%. This demonstrates that there is only a small bond between Karthus and Udyr that results in them performing at the top of their game together than without each other.
Udyr has a lower difficulty than Karthus. That means Karthus players don't need to be careful when lining up Udyr comrades to play with, as they will have to have a lower level of skill to be able to work well with you.
Fighting together, you will likely witness an overall large increase in your team’s capacity to deal magic damage. When paired, these champs are able to dish out a surprising amount of magic type damage.
Although, by bringing Karthus and Udyr together, you may not be giving your other teammates a lot of engage. Plan to pick other champions on your team that fills this relative gap in this pairing's kit.
Regardless of the skill of your Udyr teammate, you need to focus on increasing your income, outlasting your enemies, and taking down objectives. If you do this, you should do well, regardless.
To learn all of the intricacies of Karthus to work well with Udyr during both the early game and mid / late game phases of League rounds, you should continue reading to gather a few extra tricks and insights into this champion pairing. If you listen to the build and suggestions shown here, you will grow your win rate significantly.
The most important finished items to have in your Karthus and Udyr synergy build consist of Rabadon's Deathcap, Malignance, and Liandry's Torment. When Karthus combined at least these three great items in his build, he did significantly better when fighting alongside Udyr than with many other typical item sets. In fact, Karthus boasted an average winrate of 47.4% helping carry Udyr with this build.
To have the highest chance of annihilating your oponents, you should use the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Presence of Mind, and Last Stand runes from the Domination and Precision rune sets. Of all the rune builds players chose for Karthus and Udyr pairings, this composite of runes yielded the top win rate. Notably, these runes averaged a 47.4% winrate overall.
By default, tips, statistics, and builds on how to synergize Udyr with Karthus are shown for all ranked divisions combined. If you would like to scope the stats and builds to a distinct player tier, you may use the selection menu above.