Treacherous Terrain

The eight-mana price tag tells you exactly what this is built to do: end a multiplayer table in one cast. By the back half of a game, opponents are sitting on six, seven, eight lands each, and this turns every basic and dual on their side of the board, tapped or untapped, into a point of direct damage dealt to the whole table at once. The scaling is the entire pitch; it is a Fireball that reads its damage off the board's land count rather than off your remaining mana, so it climbs toward lethal as the board develops without any further investment from you. The lack of targeting matters just as much: it hits each opponent simultaneously, ignores hexproof, and cannot be redirected by the usual single-target answers, though a player with protection from red or green still walks away untouched. It also doesn't care what else is on the battlefield, since the count is lands and lands alone; an empty-looking board can still be eight to the face. What keeps the card from being dead weight early is the basic landcycling clause: when the haymaker is stranded in your opening hand, two mana converts it into the land you actually needed, so the slot never sits idle. That dual-purpose construction (game-ending sorcery that doubles as fixing) is the compromise that earns a top-end spell this narrow a function. It asks you to wait, but in the format it was made for, the wait is the point.