Veigar is extremely Mana and Cooldown Reduction dependent. Try buying items with these stats in order to increase the effectiveness of your passive and Baleful Strike.
Veigar is very fragile. It is valuable to select at least one summoner spell that can be used defensively.
Use Event Horizon to increase your chances of landing Dark Matter.
Dodging Arctic Assault and Glacial Prison can give you a huge advantage.
Focus on avoiding the second swing of Winter's Wrath which carries the brunt of the damage.
Melee enemies can also stack Frost for Sejuani, be very careful around them.
The stats provided here highlight some influential Veigar versus Sejuani matchup stats that may help you explain the differences and similarities between the two. As an example, Veigar’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Sejuani’s KDA ratio of NaN, indicating that Veigar may be more central to his team's team fighting potential than Sejuani. This observation is in large part caused by the difference in kills.
Veigar normally has a slightly larger longest killing spree than his foe does. On average, he receives less damage than Sejuani. This is usually reflective of different amounts of tankyness; however, it can also show that the one champ has less agility and thus is unable to flee from further damage when poked or engaged.
Both LoL champs are great champions. Both champs have their pros and cons. In League's current meta, Veigar usually wins when taking on Sejuani, with a 53.8% win rate. As a result, Veigar makes a great counter for Sejuani.
While Veigar does have a higher win rate compared to Sejuani, when they face off with one another, Veigar also has a much greater learning curve that makes him a more complex character to learn and master. You don't need to be too worried when picking Veigar into Sejuanias his relative depth means that you may not be able to reach his full potential without a lot of practice beforehand.
Additionally, Veigar has a good amount of utility and CC, a similar amount to Sejuani. This makes her just as valuable during teamfights, especially when facing champions with a lot of burst damage.
While there is not a single best champion overall in League of Legends, in Veigar vs Sejuani matchups, Veigar is the better champ with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your team members during team fights.
Veigar is a great counter to Sejuani. You will do well by focussing your actions on keeping up your gold and cs and taking out objectives. If you do that, you should do very well as Veigar against Sejuani.
To truly master Veigar to counter Sejuani during both the early game and mid / late game phases of League of Legends, you should continue reading to learn a few extra lessons on this matchup. If you pay attention to the build and stats displayed above, you will grow your win rate by a lot and be that much closer to League of Legends pro players.
Veigar often gets much more CS compared to Sejuani. Champions who on average don't take much CS typically don't have to have much CS to be effective, such as sup champs. They are able to scale well off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often have to have a lot of items to be effective. In either situation, try to exceed the numbers shown here to do well.
The most crucial items to have in your Veigar versus Sejuani build include Void Staff, Stormsurge, and Luden's Companion. When Veigar bought at least these three items in his build, he did significantly better against Sejuani than with most other typical counter builds. In fact, Veigar boasted an average winrate of 53.8% when countering Sejuani with these items in his kit.
To have the greatest likelihood of defeating Sejuani as Veigar, you should equip the First Strike, Magical Footwear, Biscuit Delivery, Cosmic Insight, Manaflow Band, and Transcendence runes from the Inspiration and Sorcery rune sets. Of all the rune sets players picked for Veigar vs Sejuani LoL games, this order of runes yielded the greatest win rate. In fact, these runes provided a 53.8% win rate overall.
If you would like to get Veigar versus Sejuani tips and matchup stats and build suggestions for a a particular skill level, feel free to select one from the selection menu above. At first, the stats and guides given are computed using all rounds played with both champions.