Marauding Raptor

Cost reduction on creature spells is a classic aggro accelerant, but the second ability is what makes this a design worth studying: every creature you deploy walks into two damage on arrival, and the reduction is calibrated to make that trade pay for itself. The tax is real and indifferent to creature type. Anything with two or fewer toughness dies to the trigger on entry, Dinosaur or not; your mana dork, your one-toughness utility body, your token all evaporate unless they can survive the ping. What Dinosaurs get is not immunity but reward: when the damaged creature is a Dinosaur, this 2/3 gets +2/+0, turning the burn from pure liability into an engine that grows your clock. So the deckbuilding constraint is twofold. You want creatures that are large enough to shrug off two damage, and you want them to be Dinosaurs so the trigger pumps rather than merely taxes. Sequencing matters more than usual because the trigger fires on entry regardless of intent, so a hasty deploy can cost you the very body you were trying to protect. This is a tribal enabler that punishes greed at the exact moment you would want to overextend: most want you casting anything, this one wants you casting fat things with the right type line, and it writes that requirement into the card rather than leaving it as advice.