Lead your enemy when targeting with Noxious Blast to ensure the hit.
Use Twin Fang on poisoned stationary targets like monsters and units stunned by her Petrifying Gaze for maximum damage.
Body Slam is on a very low cooldown, making it difficult to pursue Gragas. Don't overextend yourself chasing him.
Gragas can knock everybody away with his ultimate. Be careful that you don't get knocked into him or, worse, an enemy tower.
The stats shown on this page show several important Cassiopeia vs. Gragas matchup stats that can help us appreciate the differences between the two. For instance, Cassiopeia’s KDA ratio ([kills + assists] / deaths) of NaN is better than Gragas’s ratio of NaN, demonstrating that Cassiopeia may be more central to her team's team fighting capability than Gragas..
Cassiopeia typically has a slightly larger longest killing spree than her matchup does. On average, she receives a similar amount of damage to Gragas. This often reflects differing health capacities, but it can also imply that the one champion has less mobility and thus is unable to kite away from additional damage when engaged or poked.
Both League of Legends champs are great champions. Both have their strengths, weaknesses, and counters. In the game's current meta, Cassiopeia usually wins when taking on Gragas, with a 53.2% win rate. Thus, Cassiopeia makes a great counter to Gragas.
While Cassiopeia does have a higher win rate than Gragas, when they face off with one another, Cassiopeia also has a much greater level of difficulty that makes her a more time consuming champion to develop with. You don't need to be too worried when picking Cassiopeia into Gragasas her relative depth means that you may not be able to reach her full potential without a significant amount of practice beforehand.
Moreover, Cassiopeia has a good amount of utility and CC, a similar amount to Gragas. This often makes her just as valuable during team fights, especially when facing champions with a ton of burst damage.
While there isn't one best champion in League of Legends, in Cassiopeia vs Gragas matchups, Cassiopeia is the better champion with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your teammates during late stage team fights.
Cassiopeia is a great counter for Gragas. You will do well by focussing your tactics on maximizing your gold income and clearing objectives. If you are able to do that, you should do very well as Cassiopeia against Gragas.
To truly master Cassiopeia in order to counter Gragas during both the lane and mid / late game phases of League of Legends, you should continue reading to gather a few extra lessons on this matchup. If you pay attention to the build and suggestions displayed above, you should increase your win rate significantly and be closer to League of Legends pro players.
Cassiopeia on average racks up more CS as Gragas. Champs who on average don't acquire many minion kills often don't have to have much CS to be valuable teammates, such as supports. They are capable of scaling properly off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually need a lot of items to be effective. In either situation, try to exceed the numbers displayed on this page to do well.
The ideal items to use in your Cassiopeia versus Gragas build include Rylai's Crystal Scepter, Liandry's Torment, and Rod of Ages. When Cassiopeia used at least these three pieces in her build, she did much better vs. Gragas than with many other typical builds. In fact, Cassiopeia boasted an average win rate of 53.2% battling Gragas with this counter build.
To have the highest probability of annihilating Gragas as Cassiopeia, you should use the Conqueror, Presence of Mind, Legend: Tenacity, Last Stand, Manaflow Band, and Transcendence runes from the Precision and Sorcery rune sets. Out of all the rune sets players chose for Cassiopeia vs Gragas matchups, this combination of runes resulted in the best win rate. In fact, these runes gave a 53.2% win rate overall.
By default, tips, statistics, and builds on how to beat Gragas as Cassiopeia are presented for all skill levels, merged. If you would like to scope the statistics and builds to an individual skill level, you should use the selection menu located earlier on the page.