Isolated Watchtower

Catch-up ramp with a lock on the door: this taps for colorless like any utility land, but its real ability only fires once you are the one who fell behind, demanding an opponent control at least two more lands than you before you can spend two mana to scry and drop a basic onto the battlefield tapped. The gate is the whole point. Free land drops are one of the more dangerous levers a designer can pull, so this design pays for it two ways at once: the basic arrives tapped rather than ready to spend, and the ability is unavailable to the player already ahead. The moment you claw back to within one land, the door shuts. That makes it a rubber-band mechanic, a self-correcting engine that only works while you are losing the land war and switches itself off once you win it. The design sits with the handful of catch-up lands built to reward the player short on resources rather than the one snowballing, and the scry attached to each activation smooths the draws you get while digging for basics to feed it. What you give up is a land slot that does nothing proactive: no fixing, no acceleration, no relevance in a game where nobody has pulled ahead on lands. It is insurance, priced as insurance, and it only pays when the claim is filed.