Here is a full data-driven breakdown of the Legacy meta since early January 2026, covering the specific decks you asked about plus the broader picture. Data window is January 9 to March 11, 2026, across 121 tournaments (54% MTGO, 46% paper Melee events).
BEST DECK TO WIN MULTIPLE TOURNAMENTS RIGHT NOW
The data points to two strong candidates depending on your goals.
Dimir Tempo (UB Tempo / Tamiyo Tempo) is the undisputed metagame king by volume. It has 13.6% meta presence, more than double the next deck, and a 53.8% non-mirror winrate. It has the largest top 8 share at 11.1% of all top 8 slots. However, its week-by-week winrate fluctuates quite a bit (ranging from 44% to 67%), suggesting it is not a free win machine. It is the most-targeted deck in the format and requires deep experience. If you want to grind MTGO leagues and challenges consistently, this is the safe pick, built around Tamiyo, Inquisitive Student, Orcish Bowmasters, and Fatal Push with a full Force of Will / Brainstorm shell.
If you want the highest raw winrate and are willing to accept lower volume, Azorius Stoneblade is the standout outlier. It has a 66.1% non-mirror winrate over this period (125W / 64L excluding mirror matches), and a 58.3% overall rate. Sample size is smaller (52 entries, 18 tournaments played), but those numbers are genuinely extraordinary. The deck features Tamiyo, Pre-War Formalwear, Meteor Sword, and a Force of Will / Brainstorm base. It appears to be an underplayed and under-targeted deck that is punishing opponents hard. Worth serious consideration for paper especially where metagame targeting is lower than on MTGO.
For the "win multiple tournaments" goal across both online and paper, the combination answer is: Dimir Tempo if you want volume and consistency, Azorius Stoneblade if you can pilot it and want an edge while it remains under the radar.
DECK-BY-DECK ASSESSMENT
Sneak and Show (Show and Tell): 45.5% non-mirror winrate, 6.4% meta presence. Played frequently but performing below 50%. It is the second most-played combo deck and top 8 appears often (5.35% top 8 share), but it is clearly being targeted. Not recommended as your primary tournament weapon right now.
Black Saga Storm: Very small sample (51 matches in this window), 44.9% non-mirror winrate. The numbers are poor. Only 14 top 8 appearances in the entire period. Not a deck to pick up to win multiple events right now based on current data.
Epic Storm (TES / The Epic Storm): The closest archetype in the database is TES, which has a 40.5% non-mirror winrate over 182 matches. One of the worst-performing decks tracked in this period. Storm in general is not well-positioned in the current meta.
Doomsday: This is actually one of the better combo options. It has a 54.6% non-mirror winrate over 484 matches and 3.45% meta presence. Weekly trends show consistently positive performances across the window, including a 70% week in late January and 62% in mid-February. Among blue combo decks it is the standout. Solid pick if you are a dedicated pilot.
UB Tempo (Dimir Tempo): Already covered above. Best presence, 53.8% winrate, #1 top 8 share. The format's defining deck.
Affinity / Blue Artifacts: 51.1% non-mirror winrate over 696 matches, 5% meta presence, solid top 8 representation (4.16%). Steady and consistent but not spectacular. The most recent notable finish was a Legacy Challenge 32 win on March 7 (jev_, https://www.mtgo.com/decklist/legacy-challenge-32-2026-03-0712834509). It is a reasonable choice, especially in paper where less familiarity exists with its game plan, but it is not outperforming the field.
UW Stoneblade (Azorius Stoneblade): Already covered above. 66.1% non-mirror winrate is the best number in the format right now. The caveat is the smaller sample, but every data point we have on it is positive. Highly recommended as a sleeper pick.
SUMMARY TABLE (non-mirror winrate, Jan 9 - Mar 11 2026)
Azorius Stoneblade: 66.1% (52 entries, small sample but elite)
Doomsday: 54.6% (99 entries, strong for combo)
Dimir Tempo: 53.8% (393 entries, largest sample, format's best deck)
Blue Artifacts: 51.1% (154 entries, consistent)
Show and Tell: 45.5% (200 entries, underperforming)
Black Saga Storm: 44.9% (very small sample)
TES (Epic Storm): 40.5% (poor results)
Sources: Data from 121 Legacy tournaments (January 9 to March 11, 2026), 54% MTGO and 46% paper/Melee.
Recent events:
https://www.mtgo.com/decklist/legacy-challenge-32-2026-03-0812834525
https://melee.gg/Decklist/View/e01f9d45-0efe-4324-a111-b40700d2e890 (SCG CON Richmond $1K Legacy, March 8)
https://www.mtgo.com/decklist/legacy-challenge-32-2026-03-0712834509 (Blue Artifacts winner, March 7)