Now I have the top archetypes. Let me get the matchup winrates for Doomsday against the most prominent ones in parallel.
Hey @oEltinho! Here is Doomsday's matchup spread in Legacy over the last 15 days (Apr 13 - Apr 28, 2026). Overall the deck posted a 41% winrate across 39 matches in 11 entries, sitting in a rough patch right now.
Matchup breakdown (Doomsday winrate, sorted by sample size):
vs Mystic Forge Combo: 33% (2-4, 6 matches) — a notably bad matchup, worst by volume
vs Dimir Tempo: 80% (4-1, 5 matches) — the clearest positive matchup in the data
vs Show and Tell: 60% (3-2, 5 matches) — favorable, combo mirror tilts slightly Doomsday's way
vs Energy: 50% (2-2, 4 matches) — even
vs Izzet Delver: 33% (1-2, 3 matches) — unfavorable, small sample
vs Aluren: 50% (1-1, 2 matches) — even, very small sample
vs Azorius Midrange: 0% (0-2, 2 matches) — very small but rough
vs Blue Artifacts: 0% (0-1, 1 match) — single data point
vs Lands: 0% (0-1, 1 match) — single data point
vs Eldrazi: 0% (0-1, 1 match) — single data point
The story over this window is clear: Doomsday thrives against the blue fair-tempo decks (especially Dimir Tempo) and can hold its own against other combo, but struggles badly against the two top-performing combo decks in the meta — Mystic Forge Combo and to a lesser extent Izzet Delver. With Mystic Forge Combo sitting at 7.45% meta share and a 56% overall winrate, that is a painful matchup to dodge. Note that many of the sub-2-match results have very high variance.
Sources: Data from 9 Legacy tournaments (Apr 13-28, 2026), 78% MTGO / 22% Melee.
https://www.mtgo.com/decklist/legacy-challenge-32-2026-04-2612840563
https://www.mtgo.com/decklist/legacy-showcase-challenge-2026-04-2512840499
https://melee.gg/Decklist/View/02c93cab-1bd3-42f7-ae97-b436015b1416