Dream Thrush

Color-fixing pointed the wrong way. The tap ability rewrites a target land's basic type until end of turn, which means it can read as a favor (smooth a painful manabase in a multiplayer pact) but plays far more often as sabotage: convert the Island feeding a counterspell into a Mountain so the blue mana evaporates, or strip a dual's relevant half right before its controller needs it. A repeatable land-type editor on a 1/1 flier is a quiet wrench against any greedy, splash-heavy manabase, the kind of disruption that costs nothing to keep mounting turn after turn. The limits are real, though, and they keep the effect honest: it lasts only until end of turn, hits only one land per activation, and the body brings nothing beyond chipping in over the ground. Against a single problem land it is surgical; against a fully fixed mana base it is a one-per-turn nuisance an opponent sidesteps by simply sequencing their lands before they commit. The flying matters more than the small body suggests, since it turns an otherwise stationary utility creature into a slow clock pressuring the same player whose mana you are bending. Most of its life it has been a curiosity, a reminder that land-type alteration is a lever the game keeps quietly available, almost always bolted onto something too small to demand respect.