Morophon, the Boundless

Most tribes got a legendary lord in their own colors: Goblins have several, Elves have several, Vampires have several. The tribes that never got one are the reason this exists. The cost reduction is the load-bearing piece, and its exact wording does the heavy lifting: it shaves one mana of each color off every spell of the chosen type, trimming only colored pips and never the generic portion. So a creature with one pip of each color collapses to its generic remainder, and a tribe whose payoffs were scattered across the wheel (Slivers, Elementals, any theme no two-color identity could support) suddenly casts as if it lived in a single guild. That is the design target: not tribes that already field a mono-colored lord, but the ones whose color demands made them close to unbuildable. The two abilities split the labor. Changeling makes this a member of every type, so it counts toward the tribe it names; choosing the type on resolution is what locks in where the discount and the anthem land. Note the anthem reads "other creatures," so this itself sits outside its own buff, and the reduction only helps spells cast after it resolves, never its own deployment. What holds it in check is the front end: seven generic to deploy, with no discount until it arrives and the type is chosen. But the moment it resolves the reduction is live, and everything of that type still in hand casts at the discount that same turn. It plays as the top end of a plan, not a curve-filler: a payoff you build toward, an enabler that redefines which tribes can function at all.