When Kayn is in terrain near you, you will get a visual warning on the edge of the terrain he's in.
Umbral Trespass requires Kayn to damage a target first. Try to dodge Blade's Reach to deny him a long range cast of Umbral Trespass.
Damage Kayn while he's in Shadow Step to shorten its duration, or apply hard crowd control (stun, charm, knockup, etc) to end Shadow Step immediately.
The stats shown on this page emphasize some important Senna against Kayn counter statistics that can help us grasp the differences and similarities between the two. As an example, Senna’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Kayn’s ratio of NaN, demonstrating that Senna may be more central to her team's team fighting effectiveness than Kayn. This observation is largely caused by the differences in assists.
Senna often has a slightly smaller longest killing spree than her foe does. Commonly, she receives less damage than Kayn. This is usually reflective of differing health capacities, but it can also indicate that the champion with more HP 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 strengths, weaknesses, and counters. In the game's current meta, Senna usually wins when taking on Kayn, with a 51.7% win rate. As a result, Senna makes a good counter for Kayn.
While Senna does have a higher winrate than Kayn, when they face off with one another, Senna also has a lower learning curve that makes her a less difficult champ to pick up and master. You should be careful when picking Senna into Kaynas her relative depth means that you may not be able to reach her full potential without a lot of practice beforehand.
Moreover, Senna has a good amount of CC and other utility, a similar amount to Kayn. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there isn't one best champion for every situation in League of Legends, in Senna vs Kayn matchups, Senna is the better champion with a higher win rate, less champion complexity, and a similar amount of utility to help out your team members during team fights.
Senna is a decent counter to Kayn. Make sure you focus your strategy on keeping up your gold and cs and taking out objectives. If you can do that, you should do very well as Senna against Kayn.
If you would like to truly master Senna to counter Kayn during both the early game and mid / late game phases of League of Legends, you should continue reading to gather a few extra tricks and insights into this matchup. If you listen to the build and stats shown above, you should increase your win rate by a lot and be closer to League of Legends pro players.
Senna typically gets more CS relative to Kayn. Champions who on average don't get many minion kills often don't need much CS to be valuable teammates, such as sup champs. They are able to scale properly off of their abilities and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually require many items to be effective. In either situation, try to do better than the numbers reported on this page to do well.
The best items to have in your Senna versus Kayn build include Rapid Firecannon, Edge of Night, and The Collector. When Senna incorporated at least these three pieces in her build, she did a lot better countering Kayn than with most other typical counter builds. In fact, Senna boasted an average win rate of 51.7% when playing against Kayn with this counter build.
To have the best likelihood of crushing Kayn as Senna, Senna players should take the Fleet Footwork, Presence of Mind, Legend: Alacrity, Cut Down, Approach Velocity, and Biscuit Delivery runes from the Precision and Inspiration rune sets. Of all the rune sets players used for Senna vs Kayn battles, this composite of runes yielded the highest win rate. Moreover, these runes provided a 51.7% win rate overall.
If you would like to get Senna vs Kayn tips and builds for a a distinct rank, feel free to choose one from the selection menu above. If viewing for the first time, the statistics and guides given are calculated using every round run with both champs.