All-Fates Scroll

A rainbow rock with a payoff bolted to the far end. As a fixer, it does the ordinary job every three-mana mana rock does: tap for any color, smooth a greedy manabase, deploy on a turn where you have nothing better. What separates it is the escape hatch on the back, an enormous seven-mana sacrifice that turns the artifact into a refill scaled to your landbase diversity. The clever part of the design is the counting metric: not lands you control, but differently named lands. That quietly rewards a manabase built out of duals, shocks, fetches, utility lands, and one-of nonbasics rather than a stack of identical basics, and it discourages the flood-the-board-with-Islands approach that other card-draw payoffs invite. The tension is entirely in the price. Seven mana on top of the artifact's own tap is a real investment, and the reward is a variable that only pays off in decks already assembling twelve or fifteen distinct land names. In a lean deck the scroll is a color source that happens to draw two or three late; in a sprawling multicolor engine it is a game-swinging refuel. That gap between floor and ceiling is the whole identity: a mana rock that asks you to build wide on lands to unlock a draw spell hiding inside it.