Interplanar Beacon

A land built for exactly one deck: the one where every threat is a planeswalker. The fixing here is deliberately fenced off, producing two colors of any pair only to pay for planeswalker spells, which is a strange and telling restriction. Ordinary mana filtering cares nothing about what you cast; this ability refuses to feed a counterspell or a removal spell, drawing a hard line around the walker-superfriends archetype it was made to serve. The colorless mana from the untapped tap ability preserves a floor when there is nothing to ramp toward, and the incidental life gain on each planeswalker cast is a modest cushion rather than a reason to run the land. What separates it from ordinary utility fixing is how squarely it commits to a build-around thesis: rather than smoothing a two-color base, it presumes you are casting five colors of planeswalkers and asks for nothing else in return. That focus is also its ceiling. Outside a critical mass of planeswalker spells, the color-fixing ability is inert, and you are left with a land that enters untapped and taps for a single colorless. The design is honest about this trade, spending nearly all of its flexibility on one deckbuilding argument and offering little to anyone who does not share it.