Cassiopeiavs Sion
Cassiopeia vs Sion is a decisive matchup in LoL patch 26.10. Sion wins with a 63.6% win rate (+27.3%) over Cassiopeia based on 11 games. Cassiopeia wins the early laning phase while Sion scales better into the late game. Below you'll find the best Cassiopeia build, runes, laning stats, and strategies for the Cassiopeia vs Sion matchup.
Cassiopeia Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Cassiopeia performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.
Sion(36.4%)Who Wins the Cassiopeia vs Sion Matchup?
Cassiopeia vs Sion Matchup Summary
The Cassiopeia vs Sion matchup is a decisive matchup in League of Legends ranked play. Based on 11 recent matches analyzed, Sion wins with a 63.6% win rate compared to Cassiopeia's 36.4%, giving Sion a 27.3 percentage point advantage. Game phase dynamics play a critical role here: Cassiopeia controls the early laning stage, but Sion outscales as the game goes longer. The matchup shifts dramatically depending on game length — Cassiopeia needs to press advantages before Sion reaches their power spikes, while Sion should focus on safe farming and hitting key item breakpoints. The most significant statistical gap is in sustain, where Sion leads by 1,546 HP/min — a difference that heavily influences the outcome of trades and skirmishes. Sion has a strong advantage in this matchup. Cassiopeia players should play defensively, prioritize safe farming under tower, and look for opportunities created by jungle pressure or Sion overextending. Avoid prolonged trades and wait for team fights where positioning and coordination matter more. Understanding these matchup dynamics is essential for champion select decisions and in-game strategy when facing this lane opponent.
Cassiopeia vs Sion Laning Phase Breakdown
Sion is favored during the laning phase against Cassiopeia, winning 4 out of 5 key stat categories. Sion holds advantages in farming, gold income, crowd control and sustain, making them the stronger laner in this matchup.
Best Cassiopeia Build Against Sion
Sorcerer's Shoes is the optimal boots choice against Sion, providing the mobility and stats Cassiopeia needs most in this matchup. The top-performing core items for Cassiopeia against Sion are Liandry's Torment, Rylai's Crystal Scepter and Seraph's Embrace. This combination gives Cassiopeia an effective balance of damage, survivability, and utility for the matchup. This build achieves a solid 50.0% win rate across 2 games, proving it to be a reliable item path when facing Sion. Adjustments may be needed based on team compositions and game state, but this build provides the strongest foundation for the Cassiopeia vs Sion matchup.
Early Game vs Late Game
Cassiopeia50.0%Sion50.0%Cassiopeia20.0%Sion80.0%The early game (first 15 minutes) is a toss-up between Cassiopeia and Sion, with Cassiopeia holding a razor-thin 50.0% win rate edge (+0.0%). Individual skill and jungle proximity will matter more than champion advantage in the early laning phase.
Sion is far superior in the late game (25+ minutes), boasting a 80.0% win rate — 60.0 points above Cassiopeia. Extended games heavily favor Sion, whose kit and scaling make them a dominant force in team fights and objective control.
The power dynamics shift as the game progresses — Cassiopeia has the edge early, but Sion gradually takes over. However, the margins are slim enough that either champion can win at any stage with the right plays. Focus on taking advantages when you have them rather than waiting for a specific game phase.
Best Cassiopeia Runes Against Sion
Sorcery
Precision
The Sorcery and Precision rune setup gives Cassiopeia the best tools to compete against Sion in this difficult matchup, compensating for the statistical disadvantages with optimal rune synergies.
Cassiopeia matchup data for League of Legends patch 26.10. The table below shows Cassiopeia's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Cassiopeia build, runes, laning stats, and early vs late game analysis for that specific matchup.
Opponent | Win Rate | Matches | CS/min | DMG/min | Gold/game | Early WR | Late WR |
|---|---|---|---|---|---|---|---|
| 50.00% | 36 | 6.3 | 846 | 12,159 | 64.3% | 40.9% | |
| 53.33% | 30 | 6.8 | 881 | 11,332 | 50.0% | 55.6% | |
| 41.38% | 29 | 6.7 | 733 | 11,739 | 58.3% | 29.4% | |
| 31.03% | 29 | 6.6 | 831 | 10,952 | 30.8% | 31.3% | |
| 60.87% | 23 | 6.7 | 914 | 12,286 | 55.6% | 64.3% | |
| 52.17% | 23 | 6.6 | 852 | 11,552 | 50.0% | 53.9% | |
| 40.91% | 22 | 6.1 | 672 | 12,666 | 75.0% | 33.3% | |
| 47.62% | 21 | 6.4 | 752 | 12,173 | 80.0% | 37.5% | |
| 66.67% | 21 | 6.5 | 803 | 11,899 | 42.9% | 78.6% | |
| 42.11% | 19 | 6.5 | 733 | 11,490 | 25.0% | 54.5% | |
| 38.89% | 18 | 5.8 | 883 | 11,803 | 14.3% | 54.5% | |
| 35.29% | 17 | 6.4 | 776 | 10,287 | 28.6% | 40.0% | |
| 56.25% | 16 | 6.8 | 1,029 | 11,748 | 42.9% | 66.7% | |
| 37.50% | 16 | 6.4 | 871 | 12,410 | 50.0% | 30.0% | |
| 56.25% | 16 | 6.5 | 785 | 10,571 | 28.6% | 77.8% | |
| 75.00% | 16 | 6.9 | 892 | 13,261 | 40.0% | 90.9% | |
| 50.00% | 16 | 6.2 | 865 | 10,420 | 22.2% | 85.7% | |
| 68.75% | 16 | 6.0 | 767 | 9,879 | 85.7% | 55.6% | |
| 56.25% | 16 | 7.0 | 854 | 11,730 | 57.1% | 55.6% | |
| 53.33% | 15 | 6.9 | 737 | 12,904 | 40.0% | 60.0% | |
| 33.33% | 15 | 6.2 | 808 | 11,012 | 28.6% | 37.5% | |
| 57.14% | 14 | 6.8 | 687 | 10,722 | 42.9% | 71.4% | |
| 28.57% | 14 | 6.3 | 968 | 11,858 | 0.0% | 50.0% | |
| 30.77% | 13 | 6.1 | 668 | 9,202 | 28.6% | 33.3% | |
| 69.23% | 13 | 6.9 | 815 | 11,124 | 57.1% | 83.3% | |
| 46.15% | 13 | 6.8 | 903 | 11,514 | 37.5% | 60.0% | |
| 25.00% | 12 | 6.5 | 824 | 12,735 | 0.0% | 33.3% | |
| 41.67% | 12 | 6.7 | 648 | 10,428 | 50.0% | 33.3% | |
| 41.67% | 12 | 6.6 | 846 | 14,226 | 60.0% | 28.6% | |
| 36.36% | 11 | 6.7 | 985 | 10,798 | 28.6% | 50.0% | |
| 36.36% | 11 | 5.5 | 803 | 8,628 | 50.0% | 20.0% | |
| 63.64% | 11 | 7.3 | 747 | 10,926 | 71.4% | 50.0% | |
| 54.55% | 11 | 6.7 | 750 | 10,311 | 71.4% | 25.0% | |
| 54.55% | 11 | 6.2 | 1,003 | 13,562 | 50.0% | 55.6% | |
| 50.00% | 10 | 6.8 | 768 | 10,737 | 66.7% | 25.0% | |
| 50.00% | 10 | 6.3 | 709 | 12,032 | 66.7% | 42.9% | |
| 44.44% | 9 | 6.9 | 914 | 12,478 | 25.0% | 60.0% | |
| 22.22% | 9 | 6.3 | 833 | 10,946 | 25.0% | 20.0% | |
| 44.44% | 9 | 6.5 | 937 | 12,171 | 33.3% | 50.0% | |
| 33.33% | 9 | 7.2 | 942 | 13,713 | 50.0% | 28.6% | |
| 55.56% | 9 | 6.7 | 778 | 11,015 | 100.0% | 20.0% | |
| 55.56% | 9 | 5.4 | 1,116 | 13,387 | 33.3% | 66.7% | |
| 75.00% | 8 | 6.3 | 792 | 15,107 | 50.0% | 83.3% | |
| 37.50% | 8 | 6.5 | 937 | 11,123 | 50.0% | 25.0% | |
| 75.00% | 8 | 6.5 | 1,078 | 14,394 | 100.0% | 50.0% | |
| 0.00% | 7 | 7.2 | 850 | 12,028 | 0.0% | 0.0% | |
| 57.14% | 7 | 6.5 | 815 | 13,872 | 0.0% | 66.7% | |
| 71.43% | 7 | 5.1 | 734 | 13,027 | 100.0% | 66.7% | |
| 50.00% | 6 | 6.7 | 693 | 9,751 | 50.0% | 50.0% | |
| 50.00% | 6 | 6.8 | 800 | 10,458 | 50.0% | 50.0% | |
| 66.67% | 6 | 6.9 | 1,018 | 12,439 | 0.0% | 80.0% | |
| 50.00% | 6 | 6.0 | 738 | 11,461 | 50.0% | 50.0% | |
| 66.67% | 6 | 6.0 | 563 | 11,758 | 100.0% | 33.3% | |
| 50.00% | 6 | 6.5 | 739 | 12,091 | 100.0% | 40.0% | |
| 33.33% | 6 | 5.9 | 974 | 15,514 | 100.0% | 20.0% | |
| 50.00% | 6 | 6.7 | 957 | 10,875 | 66.7% | 33.3% | |
| 50.00% | 6 | 5.4 | 1,106 | 10,452 | 66.7% | 33.3% | |
| 50.00% | 6 | 6.9 | 975 | 13,737 | 66.7% | 33.3% | |
| 50.00% | 6 | 6.6 | 782 | 11,734 | 0.0% | 60.0% | |
| 50.00% | 6 | 6.7 | 724 | 10,608 | 60.0% | 0.0% | |
| 40.00% | 5 | 6.3 | 845 | 8,556 | 50.0% | 0.0% | |
| 40.00% | 5 | 7.7 | 826 | 11,766 | 50.0% | 33.3% | |
| 40.00% | 5 | 8.1 | 866 | 12,948 | 33.3% | 50.0% | |
| 60.00% | 5 | 6.9 | 814 | 12,255 | 100.0% | 33.3% | |
| 60.00% | 5 | 5.9 | 869 | 12,342 | 100.0% | 50.0% | |
| 40.00% | 5 | 6.7 | 827 | 11,932 | 50.0% | 33.3% | |
| 80.00% | 5 | 6.4 | 891 | 11,901 | 100.0% | 50.0% | |
| 60.00% | 5 | 7.5 | 1,113 | 11,889 | 66.7% | 50.0% | |
| 60.00% | 5 | 7.2 | 757 | 13,090 | 66.7% | 50.0% | |
| 100.00% | 5 | 7.2 | 946 | 13,607 | 100.0% | 100.0% | |
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Cassiopeia vs Sion - Frequently Asked Questions
How does Cassiopeia do against Sion in League of Legends?
Sion wins the Cassiopeia vs Sion matchup with a 63.6% win rate compared to Cassiopeia's 36.4%, a 27.3 percentage point difference. This data is based on 11 recent ranked games in patch 26.10.
How does Cassiopeia do against Sion in the early game?
In the early game, Cassiopeia has the advantage against Sion with a 50.0% win rate versus 50.0%. Cassiopeia players should look to press their lane advantage through aggressive trades and wave control during the first 15 minutes.
How does Cassiopeia do against Sion in the late game?
In the late game, Sion takes over the Cassiopeia vs Sion matchup with a 80.0% win rate compared to 20.0%. Sion scales better into team fights and objective contests after 25 minutes.
Who wins the Cassiopeia vs Sion matchup?
Sion wins the matchup against Cassiopeia with a 63.6% win rate in League of Legends patch 26.10. The 27.3 percentage point advantage means Sion is significantly favored in this lane matchup based on 11 games analyzed.
What is the best Cassiopeia build against Sion?
The best Cassiopeia build against Sion includes Liandry's Torment, Rylai's Crystal Scepter, Seraph's Embrace with Sorcerer's Shoes. This build achieves a 50.0% win rate in the matchup. Check the matchup breakdown above for the full item path and build order.
What are the best Cassiopeia runes against Sion?
The best Cassiopeia runes against Sion use the Sorcery primary tree with Precision secondary. This rune setup achieves a 100.0% win rate in the Cassiopeia vs Sion matchup. See the full rune breakdown in the matchup comparison above.
Does Cassiopeia counter Sion?
No, Cassiopeia struggles against Sion with only a 36.4% win rate. Sion has the advantage in this matchup. Cassiopeia players should focus on safe farming and avoiding extended trades to minimize Sion's lead.
How do I play Cassiopeia against Sion?
When playing Cassiopeia against Sion, play cautiously and avoid Sion's power spikes. Look for jungle assistance and team-dependent plays since Sion has the statistical advantage at most stages. Use the matchup-specific build and runes above to optimize your chances.