Grim.Cards Blog

News, deck-building insights, and simulation deep dives from the Grim.Cards Deck Gauntlet.

• The most broadly evidenced card on Commander’s board-impact leaderboard is a 45-cent ramp spell — 2026-08-10
  Ranked by a board-quality score sampled two turns after each card is played, the top of the Commander list is all big threats — Ureni of the Unwritten at +29.78 per observation (11 decks, 253 observations), Dragonlord Atarka at +28.17 and Ghalta, Primal Hunger at +24.17, and five of the fifteen leaders cost under sixty cents. But the entry with by far the widest evidence behind it is Farseek at +10.68 across 47 decks and 154 observations, more than double the deck coverage of anything ranked above it, at a market price of $0.45. By color, Red cards average +3.26 per observation, ahead of Green (+2.34), White (+1.56), Blue (+1.07) and Black (+0.04). The score compares your life lead, your power on board and your cards in hand at the moment a card resolves against the same three figures two turns later, so it measures what the board did next — not win rate, and not the same cards the win-rate data surfaces.
• Highest performing land runs just 31 cents — 2026-08-04
  Across 448 player-submitted Commander decks and 8,969 simulated games, decks running Path of Ancestry won 49.1% of their games (n = 117 decks, 2,218 games) — 5.9 points above the 43.2% field average, and the highest containing-deck win rate of any land among the format’s twenty most-played cards. Its TCGplayer market price is $0.31. Every other land in the top group performs within 4.5 points of the average, and the most expensive one in the group costs seven times as much as the best-performing one.
• Commander Decks Near 40% Lands Win 7 Points More Than the 35% Norm — And the Fix Is Free — 2026-07-13
  Commander decks running roughly 40% lands in their 99 posted a 49.5% win rate in a recent 218-deck simulation study — a full 7-percentage-point jump over decks at the more common ~35% land ratio (42.5%), and 6.2 points over decks at ~30% (43.3%). The modal deck in the sample runs the "standard" 35%-ish land count. The decks running more lands than that simply won more.
• Hidden Feature: Teach the AI How Your Cards Are Supposed to Behave — 2026-07-09
  Most deck testers treat every card like the AI should just magically “get it.” Cute. But Magic is not just card text. It is context, timing, sacrifice fodder, tutor priorities, combat judgment, graveyard plans, and knowing that one weird creature in your deck is not supposed to heroically die in combat like an idiot.
• Hidden Feature: Choose Who Drives Your Deck Into the Gauntlet — 2026-07-07
  Most people upload a deck to Grim.Cards, run the test, and wait for the Reaper to hand back the bad news. But there’s a feature hiding behind the gear icon on each deck that a lot of players may not realize is there.