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 some important Vex vs. Ornn matchup stats that can help you appreciate the differences between the two. For instance, Vex’s KDA ratio ([kills + assists] / deaths) of NaN is more than Ornn’s ratio of NaN, indicating that Vex may be more central to their team's team fighting capability than Ornn. This observation is largely fueled by the difference in kills.
Vex normally has a slightly larger longest kill spree than their matchup does. Typically, they receives less damage than Ornn. This commonly reflects different amounts of tankyness; however, it can also indicate that the one champ has less mobility and thus is unable to flee from additional damage when engaged or poked.
Both LoL champions are great champions. Both champs have their pros and cons. In League's current meta, Vex usually loses when playing against Ornn, with a 48.1% win rate. Thus, Vex makes a poor counter to Ornn.
While Vex does have a lower winrate than Ornn, when facing one another, Vex also has a much lower level of difficulty that makes them a less time consuming character to learn and master. You still need to be cautious when picking Vex into Ornn.
Additionally, Vex also has some amount of CC and other utility, a similar amount to Ornn. This often makes her just as valuable during teamfights, especially when fighting champions with a lot of burst damage.
While there isn't a single best champion for every situation in League of Legends, in Vex vs Ornn matchups, Ornn is the better champion with a lower win rate, less champion complexity, and a similar amount of utility to help out your allies during team fights.
Vex is a somewhat poor counter for Ornn. You will do well by focussing your tactics on maximizing your CS and taking out objectives. If you can do that, you should do very well as Vex against Ornn.
If you would like to truly master Vex in order to counter Ornn during both the lane and mid / late game phases of League of Legends, you should keep reading to gather a few extra tricks and insights into this matchup. If you mind the build and suggestions displayed here, you will increase your win rate significantly and be closer to League of Legends pro players.
Vex typically picks up a similar amount of CS compared to Ornn. Champions who typically don't earn much CS typically don't need much CS to be valuable teammates, such as support champions. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually need several high cost items to be effective. In either situation, try to do better than the numbers shown on this page to do well.
The most important items to use in your Vex versus Ornn build consist of Void Staff, Stormsurge, and Luden's Companion. When Vex combined at least these three pieces in their build, they did much better when fighting Ornn than with most other commonly used builds. In fact, Vex had an average win rate of 48.1% battling Ornn with this build.
To have the best chance of annihilating Ornn as Vex, you should equip the Electrocute, Taste of Blood, Eyeball Collection, Ultimate Hunter, Manaflow Band, and Transcendence runes from the Domination and Sorcery rune sets. Of all the rune sets players used for Vex vs Ornn fights, this combo of runes yielded the best win rate. Notably, these runes provided a 48.1% win rate overall.
If you need to get Vex versus Ornn tips and builds for a a distinct division rank, please choose one from the selection menu displayed above. If viewing for the first time, the stats and guides given are computed using all matches run with both champions.