Picking up goo chunks is very important to staying alive.
When Cell Division is ready, try to die in a position that makes it difficult for the enemy team to kill your bloblets.
Charging Elastic Slingshot from the fog of war will give opponents less time to react.
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 provided here feature several valuable Zac versus Ornn counter stats that can help us interpret the differences and similarities between the two. As an example, Zac’s KDA ratio ([kills + assists] / deaths) of NaN is more than Ornn’s ratio of NaN, indicating that Zac may be more central to his team's team fighting effectiveness than Ornn..
Zac often has a similar longest kill spree as his foe does. Typically, he takes more damage than Ornn. This is usually reflective of different amounts of tankyness; however, it can also illustrate that the champ with higher HP has less agility and thus is unable to escape further damage when poked or engaged.
Both League champs are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Zac usually fairs equally well when playing against Ornn, with a 50.5% win rate. Thus, Zac makes an ok counter for Ornn.
While Zac does have a higher winrate compared to Ornn, when on opposite teams, Zac also has a much greater level of difficulty that makes him a more difficult character to pick up and master. You still need to be cautious when picking Zac into Ornnas his relative depth means you may not be able to unleash his full potential without a lot of practice beforehand.
Additionally, Zac has some amount of CC and other utility, a similar amount to Ornn. This often 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 Zac vs Ornn matchups, Zac is the better champion with a similar win rate, more champion depth, and a similar amount of utility to help out your allied champions during team fights.
Zac is a decent counter for Ornn. Focus your gameplay on keeping up your CS and destroying objectives. If you do that, you should hold your own as Zac against Ornn.
If you would like to learn all of the intricacies of Zac in order to counter Ornn during both the early game and mid / late game phases of League of Legends, you should continue reading to gather a few extra tips and tricks for this matchup. If you mind the build and stats shown above, you will increase your win rate significantly and be closer to League of Legends pro players.
Zac most often picks up less CS relative to Ornn. Champions who typically don't take much CS usualy don't require 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 large amounts 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 on this page to do well.
The best items to focus on in your Zac versus Ornn build include Spirit Visage, Sunfire Aegis, and Randuin's Omen. When Zac included at least these three items in his build, he did much better when facing Ornn than with most other commonly used counter builds. In fact, Zac boasted an average winrate of 50.5% when countering Ornn with this counter build.
To have the best probability of beating Ornn as Zac, you should take the Aftershock, Font of Life, Conditioning, Revitalize, Legend: Tenacity, and Triumph runes from the Resolve and Precision rune sets. Of all the runes players picked for Zac vs Ornn battles, this combo of runes yielded the best win rate. In fact, these runes gave a 50.5% win rate overall.
If you want to see Zac x Ornn tips and counter builds for a a distinct skill level, feel free to choose one from the selection menu provided above. If viewing for the first time, the statistics and build suggestions given are computed using every match finished with these champs.