Roar of the Slayer is a great setup ability to land a very powerful Decimating Smash.
The Soul Furnace buff displays how much shield strength is remaining, use this information to time its explosion perfectly.
You only have very slight turning ability during Unstoppable Onslaught, so make sure to use it in straight paths.
Zilean is fragile if a team focuses on him, but otherwise he's very difficult to kill. Commit to killing him as a team.
If you're able to match Zilean's speed, it can sometimes be beneficial to wait until his ultimate has faded before landing the killing blow.
The stats provided here show several valuable Sion versus Zilean matchup statistics that can help us figure out the distinctions between these two champs. Sion’s KDA ratio ([kills + assists] / deaths) of NaN is better than Zilean’s KDA ratio of NaN, showing that Sion may be more central to his team's team fighting potential than Zilean. This observation is largely a result of the differences in deaths.
Sion typically has a slightly larger longest killing spree than his enemy does. Typically, he receives more damage than Zilean. This often reflects differing health capacities, but it can also indicate that the one champion has less mobility and thus is not able to escape further harm when poked or engaged.
Both League champs are great. Both have their pros and cons. In the game's current meta, Sion usually fairs equally well when taking on Zilean, with a 49.0% win rate. Therefore, Sion makes an ok counter for Zilean.
While Sion does have a lower winrate compared to Zilean, when they face off with one another, Sion also has a lower learning curve that makes him a less difficult champ to develop with. You should be careful when picking Sion into Zilean.
Furthermore, Sion has a good amount of utility and CC, a similar amount to Zilean. This makes her just as valuable during teamfights, especially when fighting champions with a lot of burst damage.
While there is not one best champion in League of Legends, in Sion vs Zilean matchups, Zilean is the better champion with a similar win rate, less champion complexity, and a similar amount of utility to help out your allied champions during team fights.
Sion is a somewhat poor counter to Zilean. You will do well by focussing your tactics on maximizing your gold income and taking out objectives. If you are able to do that, you should be able to stand on your own as Sion against Zilean.
If you would like to truly master Sion in order to counter Zilean during both the early game and mid / late game phases of League of Legends, you should keep reading to learn a few extra lessons on this matchup. If you pay attention to the build and suggestions shown above, you should increase your win rate by a lot and be that much closer to League of Legends pro players.
Sion typically accumulates much more CS as Zilean. Champs who on average don't earn many minion kills usualy don't have to have much CS to be valuable teammates, such as support champions. These kinds of champions are able to scale well off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often require a lot of items to be effective. In either situation, try to exceed the numbers reported on this page to do well.
The best items to use in your Sion versus Zilean build include Unending Despair, Sunfire Aegis, and Heartsteel. When Sion bought at least these three pieces in his build, he did significantly better countering Zilean than with many other commonly used item sets. In fact, Sion boasted an average winrate of 49.0% when countering Zilean with these items in his kit.
To have the highest likelihood of defeating Zilean as Sion, Sion players should equip the Grasp of the Undying, Demolish, Conditioning, Overgrowth, Minion Dematerializer, and Approach Velocity runes from the Resolve and Inspiration rune sets. Of all the rune combinations players chose for Sion vs Zilean counter picks, this blending of runes yielded the best win rate. Notably, these runes provided a 49.0% win rate overall.
If you would like to see Sion versus Zilean tips and matchup stats and build suggestions for a a specific player tier, feel free to choose one from the selection menu shown above. By default, the statistics and strategies displayed are computed using all matches run with these champions.