It takes 6 spell casts for Kassadin's slow, Force Pulse, to become castable. If he levels up that ability, judiciously use your own skills while laning against him.
Kassadin deals mostly magic damage. If he's doing well consider buying magic resist items like Mercury's Treads and Banshee's Veil.
Each time Kassadin consecutively uses Riftwalk, he pays more and more mana. Keep this in mind as you chase him.
The stats shown here highlight several valuable Rell against Kassadin counter statistics that may help us appreciate the distinctions between this pair of champions. For instance, Rell’s KDA ratio ([kills + assists] / deaths) of NaN is better than Kassadin’s ratio of NaN, indicating that Rell may be more central to her team's team fighting potential than Kassadin. This observation is largely fueled by the differences in assists.
Rell typically has a significantly smaller longest killing spree than her enemy does. On average, she takes less damage than Kassadin. This commonly reflects differing health capacities, but it can also imply that the one champ has less agility and thus is not able to kite away from additional damage when poked or engaged.
Both League champions are great champions. Both have their pros and cons. In League's current meta, Rell usually fairs equally well when playing against Kassadin, with a 50.5% win rate. Thus, Rell makes an ok counter to Kassadin.
While Rell does have a higher win rate compared to Kassadin, when they face off with one another, Rell also has a much lower learning curve that makes her a less complex champ to pick up and master. You should be careful when picking Rell into Kassadin.
Moreover, Rell has a great amount of utility and CC, a similar amount to Kassadin. This often makes her just as valuable during team fights, especially when facing champions with a ton of burst damage.
While there isn't a single best champion overall in League of Legends, in Rell vs Kassadin matchups, Rell is the better champ with a similar win rate, less champion complexity, and a similar amount of utility to help out your team members during teamfights.
Rell is a decent counter to Kassadin. You will do well by focussing your gameplay on keeping up your CS and destroying objectives. If you do that, you should be able to stand on your own as Rell against Kassadin.
If you would like to truly master Rell to counter Kassadin 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 suggestions presented here, you will increase your win rate by a lot and be that much closer to League of Legends pro players.
Rell most often gets a lot less CS relative to Kassadin. Champs who on average don't acquire many minion kills often don't have to have much CS to be effective, such as support champions. These kinds of champions are capable of scaling well off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, typically have to have many items to be effective. In either situation, try to do better than the values shown here to do well.
The most important items to use in your Rell versus Kassadin build include Trailblazer, Zeke's Convergence, and Solstice Sleigh. When Rell included at least these three items in her build, she performed much better versus Kassadin than with many other commonly used counter builds. In fact, Rell boasted an average win rate of 50.5% battling Kassadin with this counter build.
To have the highest likelihood of vanquishing Kassadin as Rell, you should use the Glacial Augment, Hextech Flashtraption, Biscuit Delivery, Cosmic Insight, Bone Plating, and Unflinching runes from the Inspiration and Resolve rune sets. Of all the rune combinations players used for Rell vs Kassadin face-offs, this set of runes resulted in the greatest win rate. In fact, these runes provided a 50.5% winrate overall.
By default, tips, stats, and builds on how to beat Kassadin as Rell are displayed for all ranked divisions combined. If you would like to filter the stats and builds to a distinct player tier, you should use the selection menu earlier on the page.