Outcaster Greenblade

The tension every land-tutoring creature has to resolve is that fixing your mana is a turn-two want and a fat body is a turn-five want, and most designs pick one. This one refuses to pick: the enters-the-battlefield search grabs a basic or a Desert to smooth an early curve, and if you fetch a Desert it is exactly what pumps it, so the creature scales with the resource it helped you find. Note the search reads "basic land card or a Desert card," which means it hunts nonbasic Deserts too, and every one you play afterward pushes its power and toughness upward. That folds two normally separate jobs, ramp-adjacent card selection and a self-growing payoff, into a single slot, with the caveat that the growth only materializes in a deck built to flood the battlefield with Deserts; strip the Deserts out and you are left with a 1/2 that fetches a basic land. The Mercenary type is the quiet part of the design, gesturing at a tribal hook. What makes the card cohere is that its floor (a body that replaces itself with a land) and its ceiling (a snowballing threat that pumps only itself, no anthem for the team) are governed by the same deckbuilding decision, so the reward tracks the commitment rather than arriving for free.