Meria's Outrider

Domain rewards you for spreading your manabase across every basic land type, a payoff structure aimed at greedy five-color builds rather than color-disciplined ones. Grafting it onto a mono-red body is the wrinkle. Red rarely wants to splash for its own sake, so this enters-the-battlefield burn scales with a deckbuilding tension the color normally ignores: you pay in fixing and consistency to turn a single trigger into a five-point strike across the table. In a full five-type build the damage lands as a genuine closing burst, a Fireball you did not have to hold up mana for; splash it into two colors and the trigger dwindles to a modest ping stapled to a 4/4. Reach is the quiet second job, giving a ground-oriented red creature a way to trade with fliers it would otherwise have no line against. The coherence of the design comes from the manabase pulling double duty: the same sprawling lands that make a wide-open deck castable also make this creature hit harder, so the reward and the requirement draw on identical sources. It is a payoff hunting for a manabase built to sprawl, which asks more of the deck than the burn number suggests, and in practice the 4/4 body pays its way more reliably than the trigger does.