Forsaken Crossroads
A tapped land that quietly hands the drawing player a rebate on the oldest structural imbalance in the game. Being on the draw means starting a turn behind, and this land narrows the gap with a fork in its enters trigger: on the play you scry 1 to smooth the top of your deck, but if you weren't the starting player, you can untap the land instead and get your mana a turn early. That branch is the whole point. Being able to condition an effect on who took the first turn is trivial to adjudicate anywhere Magic is played (both players know who went first), but few cards have bothered to build around it, and fewer still have used it to soften the coin flip rather than exploit it. Everything else is deliberately plain. Choose a color as it enters, take the tapped tax that fixed color usually costs, and pick your lane: smoothing when you're ahead on tempo, immediate mana when you're behind. It does not ask to be built around; it asks the die roll to matter a little less, and pays that out to exactly the player who needs the help while charging full price to the one who already has initiative.

