Armory Mice Arthur, Marigold Knight Brambleguard Captain Brave-Kin Duo Canyon Jerboa Cheeky House-Mouse Emberheart Challenger Flowerfoot Swordmaster Heartfire Hero Mabel, Heir to Cragflame Manifold Mouse Mouse Trapper Nettle Guard Pests of Honor Raging Battle Mouse Roughshod Duo Seedglaive Mentor Stampeding Scurryfoot Steelburr Champion Thistledown Players Tusk and Whiskers Veteran Guardmouse Whiskerquill Scribe Whiskervale Forerunner
This makes it a great early play, usually on turn 1, but not really worth keeping around once turns 3 or 4 come to pass
In cEDH, where every point of speed matters, that surprise red mana can mean the difference between getting off a win attempt or being shut out
Cruella de Vil, Fashionable Cruisier is your only real counter, but Launch can be used in a pinch too
Once your speed reaches 1, you can increase it by 1 each turn when an opponent loses life, up to a maximum of 4
Deck A is the core colors, a deck with the colors that have the highest affinity/synergy with the theme