Kassadin's ultimate has many uses and is on a shorter cooldown than most, use it often.
Kassadin has multiple item paths; he can go caster via Mana and Ability Power or anti-caster with Cooldown Reduction and Magic Resist.
Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
Try to stay away from walls. Ornn is much less strong if he cannot stun you.
Attack Ornn to keep him from creating items in lane.
The stat comparisons shown on this page clarify several significant Kassadin vs. Ornn counter stats that may help us understand the differences between the two. For instance, Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Ornn’s KDA ratio of NaN, showing that Kassadin may be more central to his team's team fighting potential than Ornn. This observation is in large part a result of the difference in kills.
Kassadin normally has a slightly larger longest kill spree than his counter does. On average, he takes less damage than Ornn. This commonly reflects different amounts of tankyness; however, it can also illustrate that the champion with higher health has less mobility and thus is not able to kite away from additional damage when engaged or poked.
Both LoL champions are great. Both champs have their strengths, weaknesses, and counters. In League's current meta, Kassadin usually fairs equally well when trying to fight Ornn, with a 50.7% win rate. Thus, Kassadin makes an ok counter for Ornn.
While Kassadin does have a higher win rate than Ornn, when facing one another, Kassadin also has a much greater learning curve that makes him a more complex champion to learn and master. You should be careful when picking Kassadin into Ornnas his relative depth means that you may not be able to reach his full potential without a lot of practice beforehand.
Additionally, Kassadin also has some amount of CC and other utility, a similar amount to Ornn. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there is not a single best champion in League of Legends, in Kassadin vs Ornn matchups, Kassadin is the better champion with a similar win rate, more champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Kassadin is a decent counter for Ornn. Make sure you focus your tactics on keeping up your CS and destroying objectives. If you do that, you should hold your own as Kassadin against Ornn.
If you would like to truly master Kassadin to counter Ornn during both the lane 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 pay attention to the build and stats shown above, you will increase your win rate significantly and be that much closer to League of Legends pro players.
Kassadin typically accumulates a similar amount of CS relative to Ornn. Champs who on average don't acquire many minion kills usualy don't require much CS to be effective, such as supports. These kinds of champions are able to scale well off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often require several high cost items to be effective. In either situation, try to exceed the values shown on this page to do well.
The most important items to focus on in your Kassadin versus Ornn build include Seraph's Embrace, Rabadon's Deathcap, and Malignance. When Kassadin incorporated at least these three pieces in his build, he performed much better countering Ornn than with most other common builds. In fact, Kassadin boasted an average win rate of 50.7% when countering Ornn with this counter build.
To have the best probability of coming out on top against Ornn as Kassadin, Kassadin players should use the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the rune sets players chose for Kassadin vs Ornn counterpicks, this blending of runes yielded the highest win rate. Moreover, these runes averaged a 50.7% win rate overall.
If you want to view Kassadin vs Ornn tips and counter builds for a an individual rank, please select one from the selection menu provided above. By default, the statistics and strategies shown are computed using all matches completed with both champs.