Cassiopeiavs Sion
Cassiopeia vs Sion is a decisive matchup in LoL patch 26.14. Cassiopeia wins with a 57.1% win rate (+14.3%) over Sion based on 7 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.
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 7 recent matches analyzed, Cassiopeia wins with a 57.1% win rate compared to Sion's 42.9%, giving Cassiopeia a 14.3 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 2,493 HP/min — a difference that heavily influences the outcome of trades and skirmishes. Cassiopeia players can confidently pick into Sion and play aggressively from level 1. Look to establish lane dominance early through favorable trades and zone Sion away from CS whenever possible. 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 3 out of 5 key stat categories. Sion holds advantages in farming, gold income and sustain, making them the stronger laner in this matchup.
Best Cassiopeia Build Against Sion
Boots of Swiftness 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 Void Staff, Rylai's Crystal Scepter and Seraph's Embrace. This combination gives Cassiopeia an effective balance of damage, survivability, and utility for the matchup. 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
Cassiopeia100.0%
Sion0.0%Cassiopeia40.0%Sion60.0%Cassiopeia dominates the early game (first 15 minutes) with a commanding 100.0% win rate — a 100.0 percentage point lead over Sion. This lopsided early game means Cassiopeia can dictate the pace of the lane from level 1, controlling trades, wave state, and river priority.
Sion is far superior in the late game (25+ minutes), boasting a 60.0% win rate — 20.0 points above Cassiopeia. Extended games heavily favor Sion, whose kit and scaling make them a dominant force in team fights and objective control.
This matchup features a dramatic power shift: Cassiopeia must aggressively press their early advantage and close out the game before Sion reaches their scaling breakpoints. If Sion survives the laning phase without falling too far behind, the matchup flips in their favor. Dragon and Rift Herald control are pivotal — the team that secures early objectives can snowball or buy time to scale.
Best Cassiopeia Runes Against Sion
Sorcery
Precision
Running Sorcery primary with Precision secondary allows Cassiopeia to press their advantage against Sion, amplifying the strengths that make this a favorable matchup.
Cassiopeia matchup data for League of Legends patch 26.14. 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 |
|---|---|---|---|---|---|---|---|
| 43.24% | 37 | 6.6 | 877 | 10,505 | 26.7% | 54.5% | |
| 50.00% | 30 | 5.9 | 865 | 10,458 | 45.5% | 52.6% | |
| 46.67% | 30 | 6.5 | 766 | 10,531 | 42.9% | 50.0% | |
| 48.28% | 29 | 6.5 | 964 | 11,073 | 56.3% | 38.5% | |
| 29.63% | 27 | 6.5 | 842 | 11,427 | 27.3% | 31.3% | |
| 56.52% | 23 | 5.5 | 650 | 10,054 | 40.0% | 69.2% | |
| 54.55% | 22 | 6.3 | 717 | 10,752 | 33.3% | 69.2% | |
| 66.67% | 21 | 6.3 | 793 | 9,592 | 77.8% | 58.3% | |
| 77.78% | 18 | 6.4 | 832 | 12,098 | 87.5% | 70.0% | |
| 41.18% | 17 | 6.2 | 859 | 10,987 | 0.0% | 63.6% | |
| 47.06% | 17 | 6.8 | 916 | 10,673 | 33.3% | 62.5% | |
| 58.82% | 17 | 6.8 | 883 | 11,902 | 50.0% | 66.7% | |
| 58.82% | 17 | 6.5 | 862 | 11,859 | 57.1% | 60.0% | |
| 41.18% | 17 | 6.1 | 696 | 10,424 | 14.3% | 60.0% | |
| 68.75% | 16 | 6.6 | 725 | 12,820 | 100.0% | 61.5% | |
| 25.00% | 16 | 6.6 | 644 | 10,619 | 22.2% | 28.6% | |
| 60.00% | 15 | 6.7 | 864 | 12,061 | 80.0% | 50.0% | |
| 28.57% | 14 | 5.2 | 947 | 11,215 | 20.0% | 33.3% | |
| 64.29% | 14 | 6.3 | 937 | 15,587 | 100.0% | 58.3% | |
| 30.77% | 13 | 7.2 | 660 | 10,238 | 33.3% | 28.6% | |
| 46.15% | 13 | 6.3 | 887 | 11,898 | 60.0% | 37.5% | |
| 38.46% | 13 | 6.0 | 749 | 11,493 | 25.0% | 44.4% | |
| 58.33% | 12 | 6.0 | 791 | 10,354 | 66.7% | 50.0% | |
| 18.18% | 11 | 6.4 | 816 | 13,124 | 0.0% | 20.0% | |
| 36.36% | 11 | 6.5 | 795 | 11,106 | 20.0% | 50.0% | |
| 45.45% | 11 | 6.4 | 698 | 11,236 | 60.0% | 33.3% | |
| 20.00% | 10 | 6.4 | 710 | 10,022 | 20.0% | 20.0% | |
| 77.78% | 9 | 6.1 | 969 | 12,632 | 66.7% | 83.3% | |
| 22.22% | 9 | 6.0 | 954 | 14,954 | 0.0% | 28.6% | |
| 77.78% | 9 | 7.0 | 835 | 8,421 | 85.7% | 50.0% | |
| 44.44% | 9 | 6.5 | 930 | 12,248 | 66.7% | 33.3% | |
| 66.67% | 9 | 6.8 | 1,033 | 12,455 | 66.7% | 66.7% | |
| 77.78% | 9 | 6.0 | 864 | 13,088 | 100.0% | 71.4% | |
| 37.50% | 8 | 6.6 | 965 | 14,894 | 33.3% | 40.0% | |
| 37.50% | 8 | 6.4 | 739 | 11,899 | 50.0% | 33.3% | |
| 57.14% | 7 | 7.4 | 1,131 | 11,888 | 100.0% | 40.0% | |
| 71.43% | 7 | 6.8 | 910 | 11,391 | 75.0% | 66.7% | |
| 42.86% | 7 | 6.7 | 910 | 11,030 | 33.3% | 50.0% | |
| 42.86% | 7 | 5.2 | 618 | 8,805 | 25.0% | 66.7% | |
| 42.86% | 7 | 7.2 | 974 | 13,071 | 0.0% | 75.0% | |
| 85.71% | 7 | 6.4 | 929 | 14,882 | 50.0% | 100.0% | |
| 0.00% | 7 | 5.9 | 643 | 9,853 | 0.0% | 0.0% | |
| 42.86% | 7 | 6.3 | 851 | 10,539 | 0.0% | 75.0% | |
| 85.71% | 7 | 6.8 | 1,021 | 12,042 | 100.0% | 66.7% | |
| 42.86% | 7 | 6.4 | 833 | 11,762 | 33.3% | 50.0% | |
| 57.14% | 7 | 6.3 | 900 | 8,838 | 66.7% | 50.0% | |
| 42.86% | 7 | 7.7 | 735 | 10,618 | 50.0% | 33.3% | |
| 57.14% | 7 | 5.6 | 864 | 9,854 | 100.0% | 0.0% | |
| 42.86% | 7 | 6.2 | 703 | 12,072 | 50.0% | 40.0% | |
| 57.14% | 7 | 6.7 | 776 | 9,868 | 75.0% | 33.3% | |
| 33.33% | 6 | 6.1 | 729 | 9,176 | 0.0% | 50.0% | |
| 16.67% | 6 | 4.8 | 717 | 11,929 | 0.0% | 20.0% | |
| 33.33% | 6 | 6.2 | 648 | 8,582 | 66.7% | 0.0% | |
| 33.33% | 6 | 6.3 | 598 | 8,920 | 25.0% | 50.0% | |
| 50.00% | 6 | 6.6 | 947 | 13,805 | 50.0% | 50.0% | |
| 16.67% | 6 | 6.0 | 712 | 9,879 | 33.3% | 0.0% | |
| 50.00% | 6 | 6.0 | 834 | 12,882 | 0.0% | 75.0% | |
| 33.33% | 6 | 6.4 | 952 | 13,204 | 0.0% | 40.0% | |
| 50.00% | 6 | 7.2 | 1,092 | 9,784 | 25.0% | 100.0% | |
| 20.00% | 5 | 6.0 | 720 | 10,789 | 0.0% | 33.3% | |
| 60.00% | 5 | 7.2 | 1,062 | 12,030 | 50.0% | 66.7% | |
| 40.00% | 5 | 6.5 | 692 | 12,201 | 50.0% | 33.3% | |
| 80.00% | 5 | 8.2 | 930 | 11,461 | 100.0% | 50.0% | |
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Cassiopeia vs Sion - Frequently Asked Questions
How does Cassiopeia do against Sion in League of Legends?
Cassiopeia wins the Cassiopeia vs Sion matchup with a 57.1% win rate compared to Sion's 42.9%, a 14.3 percentage point difference. This data is based on 7 recent ranked games in patch 26.14.
How does Cassiopeia do against Sion in the early game?
In the early game, Cassiopeia has the advantage against Sion with a 100.0% win rate versus 0.0%. 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 60.0% win rate compared to 40.0%. Sion scales better into team fights and objective contests after 25 minutes.
Who wins the Cassiopeia vs Sion matchup?
Cassiopeia wins the matchup against Sion with a 57.1% win rate in League of Legends patch 26.14. The 14.3 percentage point advantage means Cassiopeia is significantly favored in this lane matchup based on 7 games analyzed.
What is the best Cassiopeia build against Sion?
The best Cassiopeia build against Sion includes Void Staff, Rylai's Crystal Scepter, Seraph's Embrace with Boots of Swiftness. 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 0.0% win rate in the Cassiopeia vs Sion matchup. See the full rune breakdown in the matchup comparison above.
Does Cassiopeia counter Sion?
Yes, Cassiopeia has a favorable matchup against Sion with a 57.1% win rate. Cassiopeia strongly counters Sion in lane based on current patch 26.14 data.
How do I play Cassiopeia against Sion?
When playing Cassiopeia against Sion, leverage your statistical advantages by trading aggressively during favorable windows. You have early game priority — look for kills and zone control before first recall. Build the recommended items and runes for this specific matchup for the best results.