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.
Orianna can only affect the area the Ball is around. Use this to your advantage.
Watch out for Orianna's Ball returning to her due to leashing. This may cause some unexpected situations.
The stat comparisons provided here show some significant Karthus vs. Orianna counter statistics that may help us distinguish the differences and similarities between this set of champions. As an example, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is more than Orianna’s KDA ratio of NaN, showing that Karthus may be more central to his team's team fighting capacity than Orianna..
Karthus typically has a similar longest killing spree as his enemy does. Typically, he receives more damage than Orianna. This commonly reflects different amounts of tankyness, yet it can also show that the one champion has less mobility and thus is unable to escape further damage when engaged or poked.
Both League champions are great. Both have their pros and cons. In League's current meta, Karthus usually fairs equally well when trying to fight Orianna, with a 50.6% win rate. Therefore, Karthus makes an ok counter to Orianna.
While Karthus does have a higher winrate than Orianna, when facing one another, Karthus also has a greater learning curve that makes him a more challenging champion to learn and master. You should be careful when picking Karthus into Oriannaas his relative depth means you may not be able to reach his full potential without a significant amount of practice beforehand.
Furthermore, Karthus also has some amount of utility and CC, a similar amount to Orianna. This often makes her just as valuable during team fights, especially when trying to counter champions with a ton of burst damage.
While there isn't a single best champion overall in League of Legends, in Karthus vs Orianna matchups, Karthus is the better champ with a similar win rate, similar champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Karthus is a decent counter for Orianna. Focus your strategy on increasing your gold and cs and destroying objectives. If you do that, you should be able to stand on your own as Karthus against Orianna.
If you would like to truly master Karthus in order to counter Orianna during both the laning and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tricks and insights into this matchup. If you mind the build and suggestions shown above, you should increase your win rate by a lot and be closer to League of Legends pro players.
Karthus typically racks up less CS compared to Orianna. Champions who on average don't acquire many minion kills often don't have to have much CS to be effective, such as sup champs. They are capable of scaling properly off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often need several high cost items to be effective. In either case, try to do better than the values reported on this page to do well.
The most crucial items to have in your Karthus versus Orianna build include Rabadon's Deathcap, Malignance, and Liandry's Torment. When Karthus incorporated at least these three items in his build, he did a lot better vs Orianna than with many other typical builds. In fact, Karthus boasted an average winrate of 50.6% when countering Orianna with this counter build.
To have the highest chance of crushing Orianna as Karthus, you should equip the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Gathering Storm, and Transcendence runes from the Domination and Sorcery rune sets. Of all the rune combinations that we analyzed for Karthus vs Orianna face-offs, this composite of runes resulted in the greatest win rate. Moreover, these runes provided a 50.6% winrate overall.
By default, tips, stats, and builds on how to beat Orianna as Karthus are displayed for every ranked division. If you want to narrow the stats and builds to an individual player tier, you can use the selection menu located earlier on the page.