The Dimir Midrange result came back as a Standard archetype, not Legacy. Let me pull the Legacy-specific card lists for both archetypes to make a proper comparison.
Great, I now have detailed card data for both archetypes in Legacy. Let me get one more data point to compare their key distinguishing cards.
Here is the breakdown based on the actual card data from the past 90 days in Legacy:
Both archetypes share a similar blue-black shell: Polluted Delta, Underground Sea, Brainstorm, Ponder, Force of Will, Thoughtseize, and Tamiyo, Inquisitive Student are staples in both. The differences show up in three key areas:
Tempo tools: Dimir Tempo runs Daze at near-universal rates (97.7% presence, avg ~3 copies) and Wasteland at 99.7%, both of which define the classic tempo game plan of disrupting the opponent's mana while developing your own threats quickly. Fatal Push also appears in 100% of Tempo lists vs only 63.8% of Midrange lists. Murktide Regent is essentially a Tempo-exclusive finisher (98% presence in Tempo, virtually absent in Midrange). Brazen Borrower shows up in 85% of Tempo lists as an additional tempo threat/bounce effect.
Threat density and speed: Tempo leans on Orcish Bowmasters (99% presence) alongside Murktide and Kaito as fast threats that close games quickly. Midrange runs these at much lower rates (Bowmasters at 58%, Kaito at 35%) and instead folds in reanimation elements: roughly 32% of Midrange lists run Reanimate at 4 copies, Animate Dead, Atraxa Grand Unifier, and Archon of Cruelty. That reanimation package is entirely absent from Tempo.
Grind plan: Dimir Midrange is willing to go long. It plays Sheoldred's Edict for additional removal flexibility (42% presence) and Mystic Sanctuary as a late-game value engine. The overall land count tends to be higher (fewer fetchlands, more basics per list) to support that slower gameplan. Daze drops significantly in Midrange (63.8% vs 97.7%) because bouncing your own lands is painful when you want to hit later land drops.
In short: Dimir Tempo is a blue-black Delver-style deck that uses mana disruption (Wasteland, Daze) and fast threats (Murktide) to end games early. Dimir Midrange uses the same disruptive shell but cuts the all-in tempo elements in favor of a longer game plan, often including a reanimation sub-package as an alternate win condition.
Sources: Data from 137 Legacy tournaments (Mar 15 - Jun 15, 2026), 53% MTGO / 47% Melee.
https://www.mtgo.com/decklist/legacy-challenge-32-2026-06-1412844337
https://www.mtgo.com/decklist/legacy-challenge-32-2026-06-1412844331
https://melee.gg/Decklist/View/43ac43fd-796b-407d-9c17-b46800f15bd6