Exactly four elemental Dragons, with Soul type inferred from the repeated element.
Dragon decision study13,074 PRO GAMES · 5,406 SOUL CAPTURES
Cloud separated. Champion pairings did not.
After holding the four-Dragon milestone constant, Cloud Soul was the only element with a repeatable, multiple-testing-safe advantage. We found no champion-specific Dragon pairing strong enough to publish as a recommendation.
Observed final win rate · 95% interval 92.0%–95.2%.
Versus the average of other Souls · 95% interval +1.8 pp to +5.0 pp.
500 testable champion × Rift interactions; none cleared the gate.
THE ANSWER
One type-level signal. No defensible champion tier list.
Cloud is meaningful in this dataset. Soul holders won +3.2 pp more often than holders of other Souls and finished with a 0.50-tower larger differential. Both survived correction across 30 outcome tests.
The other five did not separate reliably. Their observed rates differ, but the uncertainty and multiple comparisons are large enough that ordering them would turn noise into a ranking.
SOUL RESULTS
Compare teams at the same four-Dragon milestone.
The adjusted column standardizes over patch, league, side and both five-champion drafts. It improves comparability, but final outcomes are still not post-capture causal effects because Soul timestamps are absent.
| Element | Soul captures | Observed win | Adjusted win | Adjusted edge | Read |
|---|---|---|---|---|---|
| Cloud | 889 | 93.8%92.0%–95.2% | 94.0% | +3.4 pp+1.8 pp to +5.0 pp | Meaningful |
| Chemtech | 982 | 89.3%87.2%–91.1% | 89.5% | -2.0 pp-4.1 pp to -0.2 pp | No separation |
| Hextech | 875 | 92.2%90.3%–93.8% | 92.1% | +1.1 pp-0.6 pp to +3.0 pp | No separation |
| Infernal | 867 | 89.6%87.4%–91.5% | 89.1% | -2.5 pp-4.4 pp to +0.0 pp | No separation |
| Mountain | 882 | 91.5%89.5%–93.2% | 91.7% | +0.7 pp-1.1 pp to +2.8 pp | No separation |
| Ocean | 911 | 90.7%88.6%–92.4% | 90.5% | -0.7 pp-3.0 pp to +1.3 pp | No separation |
What “meaningful” means here. The 95% bootstrap interval must exclude zero and the result must remain below a 5% false-discovery threshold. Only Cloud clears both conditions. A high raw rate alone does not qualify.
WHAT CLOUD CHANGED
More wins and more structures—not a different fight profile.
Cloud’s final-win edge and tower differential survived correction. Differences in game duration, kill differential and Baron capture did not.
95% interval +1.4 pp to +4.9 pp · q=0.015.
95% interval +0.23 to +0.76 · q=0.015.
Duration, kill differential and Baron rate did not survive the same test family.
Best interpretation: Cloud’s movement reward appears to improve closing and structural conversion once a pro team reaches Soul. The data cannot isolate whether the extra towers happened before or after Soul, so “appears” is intentional.
CHAMPIONS BY TYPE
No champion earns a recommendation badge yet.
We tested champion performance across observable Rift elements, required at least 50 games on the element and 200 elsewhere, corrected 500 comparisons, and required the direction to repeat in both 2025 and 2026.
PUBLICATION GATE0 supported pairings
That is evidence against publishing a confident “Ocean champions” or “Hextech champions” list from this corpus. Mechanical fit can generate hypotheses; it cannot substitute for an interaction result.
| Watch only | Rift | Type games | Type-relative signal | False-discovery q | Decision |
|---|---|---|---|---|---|
| Miss Fortune | Mountain | 156 | +13.2 pp | 0.237 | Do not recommend |
| Vi | Cloud | 353 | -9.5 pp | 0.159 | Do not recommend |
| Hwei | Ocean | 129 | +17.8 pp | 0.121 | Do not recommend |
| Jarvan IV | Chemtech | 251 | -10.4 pp | 0.237 | Do not recommend |
Why show failed signals? They document what to retest as the sample grows. Hwei–Ocean, Vi–Cloud, Miss Fortune–Mountain and Jarvan IV–Chemtech repeated directionally across the two seasons, but none remained reliable after testing every eligible champion pairing.
MECHANICS, NOT RANKINGS
Use the tooltip to form a hypothesis—not to fake a result.
These cards state Riot’s reward mechanics and the plausible pathway each one would need to show in future data. They are not champion flags.
MEASURED SIGNAL
Cloud
- Stack
- Slow resistance and out-of-combat movement speed
- Soul
- Permanent movement speed, with a burst after casting your ultimate
Separated in the pro sample
If the effect is real, access, rotation and post-ultimate repositioning are the likely pathways.
MECHANICAL HYPOTHESIS
Chemtech
- Stack
- Tenacity plus healing and shielding power
- Soul
- More damage dealt and less damage taken while below half health
Not separated in the pro sample
The mechanic suggests sustain and anti-control value, but the pro data does not establish a champion-specific beneficiary.
MECHANICAL HYPOTHESIS
Hextech
- Stack
- Attack speed and ability haste
- Soul
- Chain lightning from attacks and abilities that damages and slows
Not separated in the pro sample
The stack reaches many kits, but breadth is a mechanical argument—not evidence that Hextech produces more wins.
MECHANICAL HYPOTHESIS
Infernal
- Stack
- A percentage increase to bonus attack damage and ability power
- Soul
- Periodic damaging hits create an area explosion
Not separated in the pro sample
Damage ratios make the theory intuitive. The measured Soul result was not distinguishable from the field.
MECHANICAL HYPOTHESIS
Mountain
- Stack
- A percentage increase to bonus armor and magic resistance
- Soul
- A protective shield after avoiding damage
Not separated in the pro sample
Purchased resistances should amplify the stack, yet no tank or carry pairing cleared the champion evidence gate.
MECHANICAL HYPOTHESIS
Ocean
- Stack
- Missing-health regeneration over time
- Soul
- Damage to enemies restores health and combat resources
Not separated in the pro sample
Long fights are the proposed pathway. Hwei is a watchlist signal, not a supported recommendation.
IS FOUR WORTH IT?
Soul is valuable. A losing route to Soul is not.
Soul holders won 91.2% in this pro sample, but that is mostly a selected state: teams must already control four Dragon captures. Use the separate state-adjusted study for the marginal decision.
Soul—or Soul denial—is the stake
Enter together with stable waves, usable ultimates, vision and Smite. Cloud’s edge strengthens the prize, not a bad setup.
The other side already owns the pit
Take guaranteed Baron pressure, inhibitors, towers, camps or a clean reset. A give is only a loss when it buys nothing.
The fight costs more than the reward
Do not donate multiple deaths, Baron and structures to contest one stack. Permanent value still has a break-even price.
Separate replay estimate: Manalytics’ capture-versus-one-minute-wait model estimated Soul at +7.4 final-win points (95% interval +3.7 to +11.1; 1,000 supported captures). It is a stronger decision estimate than the 91% Soul-holder win rate, but it is not type-specific and still has unmeasured vision, position, cooldown and comms.
THE PLAYER READ
Prioritize Soul. Give Cloud extra respect. Do not draft around an unproven pairing.
The new evidence supports exactly one type claim: Cloud Soul separated from the field in professional play, including after draft and context adjustment.
For every champion-specific claim, the answer is still not enough evidence. Use the mechanics to plan how a buff might help, but do not present that intuition as a measured matchup.
METHOD & SOURCES
Reproducible, bounded and deliberately conservative.
dragon-type-pro-v1.0 · 70971d1c2eb5
Population. 13,074 complete professional games from 2025-02-08 through 2026-05-22, patches 15.03–16.10 across 50 leagues. This is not solo queue.
Soul identification. A team must have exactly four elemental Dragons, and one elemental type must be the unique repeated type across both teams. That leaves 5,406 Soul captures.
Inference. Outcome fingerprints use 2,000 game bootstraps and false-discovery correction across 30 tests. Adjusted Soul rates use 500 bootstraps after standardizing patch, league, side and both drafts. Champion interactions use minimum-cell gates, two-season agreement and false-discovery correction.
Hard limit. Oracle’s Elixir provides final-game totals, not the timestamped post-Soul trajectory. Results describe comparative final outcomes among Soul or Rift types; they do not prove the isolated buff caused the difference.
Oracle's Elixir · Match Data Downloads — The professional match source and update policy.
Oracle's Elixir · Match Data Dictionary — Definitions for results and elemental-drake columns.
2025 analysis snapshot — Reproducible mirror of the named Oracle’s Elixir CSV.
2026 analysis snapshot — Reproducible mirror through May 22, 2026.
Riot Games · Patch 25.S1.3 notes — Cloud Soul nerf, Chemtech Soul buff and the start of this study window.
Riot Games · Patch 26.18 notes — Current-patch review checkpoint; no elemental reward change is listed.