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.
Veigar is extremely Mana and Cooldown Reduction dependent. Try buying items with these stats in order to increase the effectiveness of your passive and Baleful Strike.
Veigar is very fragile. It is valuable to select at least one summoner spell that can be used defensively.
Use Event Horizon to increase your chances of landing Dark Matter.
The Karthus Veigar synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Veigar, 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 very large drop in his KDA (ratio of kills and assists to deaths) when paired with Veigar. His KDA decreased from NaN to NaN. This worsening shows that Veigar helps Karthus perform worse in ranked League of Legends games. Yet, the small difference proves that this performance change is only marginal.
When Karthus tries to synergize with Veigar, he sees a barely noticable drop in his complete damage dealt. This change could signal that Veigar does not support by providing protection for him to deal more damage or that his allyship also helps increase the round's duration. Similarly, when Karthus is played together with Veigar on the same team, he usually scores many fewer killing sprees compared to when he plays alone. This is contrasting evidence that he is worse when playing with Veigar.
Moreover, when Karthus plays with Veigar on the same side, he typically receives a little more damage than when he plays alone. Receiving more damage could indicate that Veigar does a poor job of covering Karthus in teamfights.
There is no ideal companion for Karthus that will always be his ideal synergy. However, Veigar is a below average companion for Karthus. By locking into the same side as Karthus, he decreases their win rate by -2.2% to 45.1%. This demonstrates that there is a harmful strategic relationship between Karthus and Veigar that allows them to perform worse together than without each other.
Veigar has a lower difficulty than Karthus. That means Karthus players don't need to be careful when lining up Veigar teammates to play with, as they will require a relatively low level of skill to be able to do well with you.
When playing together, Karthus players should witness an overall large increase in your team’s capacity to deal magic damage. Together, these two can blast through enemies with magic damage.
Although, by grouping Karthus and Veigar together, you will not be giving your team a lot of AD. Plan to have other champs on your team that helps cover this disparity in this pairing's playstyle.
Regardless of the skill of your Veigar teammate, you should focus on increasing your income, outlasting your enemies, and clearing objectives. If you do this, you will do well, regardless.
If you would like to learn all of the intricacies of Karthus to work well with Veigar during both the early game and mid / late game phases of LoL rounds, you should continue reading to learn a few extra lessons on this champion pairing. If you mind the build and stats presented above, you will grow your win rate significantly.
The best finished items to use in your Karthus and Veigar synergy build include Rabadon's Deathcap, Malignance, and Stormsurge. When Karthus incorporated at least these three great items in his build, he did much better when fighting alongside Veigar than with many other typical item sets. In fact, Karthus boasted an average win rate of 45.1% helping carry Veigar with this build.
To have the greatest chance of defeating 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. Out of all the rune builds players used for this champion pairing, this sequence of runes yielded the top win rate. Moreover, these runes provided a 45.1% win rate overall.
By default, tips, stats, and builds on how to pair Veigar with Karthus are shown for all skill levels, merged. If you would like to scope the statistics and builds to a particular division, you may use the selection menu located earlier on the page.