Hall of Tagsin

The Powerstone mechanic gave designers a way to hand out ramp that self-limits: a token that taps for colorless but can't be spent to cast nonartifact spells. This land turns that restriction into a plan. The first two abilities are unremarkable fixing, a colorless tap and a filtered any-color tap that costs a mana to activate, the sort of rate a bounce-taxed dual has offered for years. The third is where the card earns its identity: for four generic and a tap, it fabricates a tapped Powerstone that will never help cast the creatures and enchantments most shells want to power out. That is the balancing clause doing its work. The land builds a stockpile of mana that only artifact-heavy strategies can convert into pressure, which leaves the ability inert for anyone not already leaning on expensive artifacts and a genuine engine for anyone who is. It is a manufacturing plant disguised as a fixing land, and the four-mana price tag on each stone keeps the output slow enough that it never resembles a fast-mana enabler. What makes it worth building around is the compounding: each Powerstone shortens the runway to the next big artifact, and once the colorless surplus starts arriving, it arrives every turn. The narrow spend clause is the entire reason it can generate mana at all without warping the decks it touches.