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.
Interrupting the charge up on Absolute Zero will lower the amount of damage your team takes.
Using Summoner Flash is a surefire way to escape Absolute Zero.
Biggest Snowball Ever moves very fast but cannot turn as quickly, so don't try to escape it by running away in a straight line. Instead, make sudden, sharp turns.
The stats shown on this page underscore some strategic Kassadin against Nunu & Willump counter statistics that can help us interpret the distinctions between this pair of champs. Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is more than Nunu & Willump’s ratio of NaN, indicating that Kassadin may be more central to his team's team fighting effectiveness than Nunu & Willump..
Kassadin usually has a slightly larger longest killing spree than his enemy does. Commonly, he takes less damage than Nunu & Willump. This commonly reflects different amounts of tankyness, but it can also illustrate that the one champ has less mobility and thus is not able to flee from additional damage when engaged or poked.
Both LoL champs are great champions. Both have their pros and cons. In League's current meta, Kassadin usually wins when playing against Nunu & Willump, with a 52.4% win rate. Therefore, Kassadin makes a good counter to Nunu & Willump.
While Kassadin does have a higher winrate than Nunu & Willump, when on opposite teams, Kassadin also has a much greater level of difficulty that makes him a more difficult champ to develop with. You should be be fine when picking Kassadin into Nunu & Willumpas his relative depth means that you may not be able to reach his full potential without a significant amount of practice beforehand.
Additionally, Kassadin has some amount of utility and CC, a similar amount to Nunu & Willump. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there isn't one best champion for every situation in League of Legends, in Kassadin vs Nunu & Willump matchups, Kassadin is the better champion with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your allies during team fights.
Kassadin is a good counter for Nunu & Willump. Focus your play on keeping up your CS and clearing objectives. If you are able to do that, you should be able to stand on your own as Kassadin against Nunu & Willump.
If you would like to truly master Kassadin to counter Nunu & Willump during both the early game and mid / late game phases of League of Legends, you should continue reading to learn a few extra tips and tricks for this matchup. If you listen to the build and tips shown above, you should increase your win rate significantly and be closer to League of Legends pro players.
Kassadin typically racks up much more CS compared to Nunu & Willump. Champions who typically don't take many minion kills typically don't need much CS to be effective, such as supports. They are able to scale well off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, often need several high cost items to be effective. In either situation, try to exceed the numbers reported here to do well.
The best items to prioritize in your Kassadin versus Nunu & Willump build consist of Rabadon's Deathcap, Malignance, and Rod of Ages. When Kassadin incorporated at least these three pieces in his build, he did a lot better countering Nunu & Willump than with most other common builds. In fact, Kassadin boasted an average win rate of 52.4% when playing against Nunu & Willump with this counter build.
To have the highest probability of crushing Nunu & Willump as Kassadin, you 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 runes players used for Kassadin vs Nunu & Willump matchups, this combination of runes yielded the greatest win rate. Moreover, these runes gave a 52.4% win rate overall.
By default, tips, statistics, and builds on how to beat Nunu & Willump as Kassadin are displayed for all skill levels combined. To scope the stats and builds to an individual player tier, you can use the selection menu located above.