Mystic Skull // Mystic Monstrosity

The two-mana any-color rock is a familiar shape, but the reverse face reframes what fixing can be: it hands every land you control an ability to tap for any color at once. That is a categorical jump, not an incremental one. One mana rock fixes a single color per turn; a global grant means every basic and every fetched dual quietly doubles as a five-color source, without crowding the board with extra fixers. The five-mana transform cost is the brake on all this, an enormous investment to flip, which means the early turns are spent as a plain fixer before the payoff ever arrives. That gulf between the modest front and the sweeping back is why the transform mechanic works here: a cheap artifact fixer sits up front at two mana, and a far bigger reward waits on the back, bought with mana a deck might rather spend on threats. The Construct that shows up when it flips is beside the point; nobody transforms this for a beater. It flips to solve what no stack of individual fixing rocks can: casting spells whose color demands outrun a normal manabase, in decks greedy enough to need every land pulling double duty.